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Đáp án là: has already done (câu chia thời hiện tại hoàn thành vì có already).
1 will have
2 looked
3 had fed
4 would understand
5 would arrive
6 would have had
7 swim
8 press
9 asked
10 would call
1 haven't seen/left
2 has worked
3 was built
4 Have...eaten
Đáp án là: has learnt (Câu chia thời hiện tại hoàn thành vì có trạng từ “since”).
1. didn't have
2. has studied
3. was sitting
4. will rain
5. Have - seen
6. didn't cook
7. asking
8. have you lived
1. In the past, women __didn't have______________ to go to work. (not have)
2. He _____has studied________ (study) English for 4 years so far.
3. When I saw her, she ____was sitting_______ in a café. (sit)
4. I hope, it _____will rain_______ next week. (rain)
5. _____Have_______ you ever ____seen_______ an elephant ? (see)
6. We (not cook) ____didn't cook__________ Chung cakes last year.
7. It’s no use (ask ) __asking_______ the children to work harder.. How 8. 8. How long __have_______ you (live)___lived_______ here? For 5 years.
1. You (study)were studying when she called.
2. I (watch) was watching TV when she called.
3. When the phone rang, she (write)was writing a letter.
4. While we (have) were having the picnic, it started to rain.
5. What ( you / do)were you doingwhen the earthquake started?
6. I (listen)was listening to my iPod, so I didn't hear the fire alarm.
7. While John (sleep)was sleeping last night, someone stole his car.
8. Sammy (wait)was waiting for us when we got off the plane.
9. While I (write)was writing the email, the computer suddenly went off.
10. Last night at 6 PM, I (eat)was eating dinner.
11. At midnight, we (still drive)were still driving through the desert.
12. Yesterday at this time, I (sit)was sittingat my desk at work.
13. I (study)was studyingwhile he (make)was making dinner.
14. While Ellen (read)was reading , Tim (watch)was watching television.
15. You (listen) Were-listening while he (talk)was talking?
Đáp án là: to learn/ learning (start to V/ Ving: bắt đầu làm gì).