Chia động từ trong ngoặc:
1) she (was studying) english when the old teacher (came) here
2) he spent 2 hours (planting ) these trees
3) he (will meet) me as soon as he (finishes) the work
4) It takes us 2 hours (to do ) exercises
5) It is high time all 9A students (learned) hard
Viết lại câu:
1) he spent too much time doing exercises
=> It took him too much time to do exercises
2) the girl is workinh here. Her sister is receiving a gift
=> the girl whose sister is receiving a gift is working here
3) the book is very interesting
=> what an interesting book
4) the book is interesting . We bought it yesterday
=> the book which we bought yesterday is interesting