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17 tháng 1 2022
It'll be several years before we....a manned mission to Mars.
A. sent B. have sent C. had sent D. will send
CL
31 tháng 8 2017
Điền từ vào ô trống
Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow..compared...with the fastest traveler in the ..known...universe-light. Scientists calculate that light travels 186000 miles a second!
Swift ....as..it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to...reach...us.
Because of the time lights takes to travel the....distance....of space, it is possible to "see" an event long.....after...is has happened. In AD 1054, Chinese astronauts recorded the..appearance.... of an object that ..lit.. up the night sky. They were seeing an exploding star. Yet scientists today calculate that the stars ...exploded..... more than four thousand years ago. .....Like.... the Chinese observers, we too may "see" happening vast distances away and long before our own time.
31 tháng 8 2017
Điền từ vào ô trống
Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow..compared...with the fastest traveler in the ...observable..universe-light. Scientists calculate that light travels 186000 miles a second!
Swift ...as...it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to...reach...us.
Because of the time lights takes to travel the....distance....of space, it is possible to "see" an event long.....after...is has happened. In AD 1054, Chinese astronauts recorded the...appearance... of an object that ..lit.. up the night sky. They were seeing an exploding star. Yet scientists today calculate that the stars ...exploded..... more than four thousand years ago. ....Like.... the Chinese observers, we too may "see" happening vast distances away and long before our own time.
25 tháng 4 2018
Supply the correct tense of the verbs in brackets.
1.he(be)was_an experienced salesman before he decided to set up his own business.
2.we(not meet)haven't met_her for five years.
TD
19 tháng 5 2017
1 at school , we (write ) .........WRITE.......... almost every lesson in our notebook
2 the earth (move ) ..........MOVES.............around the sun once every 360days
3 do you know the man who ( smoke ) ...........SMOKING......... over there .?
4 what DOES your mother (do ) ........DO........after work ? she ( do ) ... DOES....the housework and watch tv
5 there ( not be ).........AREN'T............ any rivers and mountains in my village
6 i ( read ) ................READ....... that novel by hemingway several times before
7 tom ( never / be ) ............HAS NEVER BEEN........ in ha noi before
8the plane ( land ) ....LANDED.... . at a small town. it then (take )...TOOK... off immediately after refueling
9 she (be ) ...WAS. so happy when she (hear) ...HEAD..the news that she (start).STARTED... to cry
10 we (have ) ...WERE HAVING...dinner when the doorbell (ring ).......RANG...............
DT
19 tháng 5 2017
1 at school , we (write ) .........write.......... almost every lesson in our notebook
2 the earth (move ) ........moves ...............around the sun once every 360days
3 do you know the man who ( smoke ) ........smoking............ over there .?
4 what does your mother (do ) .....do...........after work ? she ( do ) ..does. ....the housework and watch tv
5 there ( not be )......aren't............... any rivers and mountains in my village
6 i ( read ) ......read................. that novel by hemingway several times before
7 tom ( never / be ) .....has never been............... in ha noi before
8the plane ( land ) ...landed ..... . at a small town. it then (take ).took..... off immediately after refueling
9 she (be ) was.... so happy when she (hear) .heard....the news that she (start)...started. to cry
10 we (have ) ...were having...dinner when the doorbell (ring).....rang................
NN
30 tháng 3 2019
A. Choose one sentence that has different meaning to the root one.
1. Despite the heavy snow, we got home on time.
a. Although it snowed heavily, we got home on time.
b. The heavy snow prevented us from getting home on time.
c. In spite of the fact that it snowed heavily, we got home on time.
d. It snowed heavily. However, we got home on time.
2. John Waye, who is our next-door neighbor, is a journalist,
a. We live next door to a journalist whose name is John Waye.
b. John Waye, who works as a journalist, is our next-door neighbor.
c. Our next-door neighbor, whose name is John Waye, is a journalist.
d. John Waye is our neighbor who lives, next door to a journalist
3. We last went to London two years ago.
a. We haven't been to London for two years.
b. It's two years since we last went to London.
c. We have been in London for two years.
d. The last time we went to London was two years ago.
4. Study harder or you won't pass the exam.
a. If you don't study harder, you won't pass the exam.
b. Unless you study harder, you will fail the exam.
c. If you don't study harder, you will fail the exam.
d. If you don't pass the exam, you will have to study harder.
5. Why don't we buy some canned food before a typhoon?
a. I reminded them to buy some canned food before a typhoon.
b. I suggested buying some canned food before a typhoorn
c. What about buying some canned food before a typhoon?
d. Shall we buy some canned food before a typhoon?
selected nha
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