Chọn câu trả lời đúng nhất
1. I.......the lesson now.
A.am understanding
B.will umderstand
C.understand
D.has understood
2. Columbus....... America in 1992.
A.discovered
B.has discovered
C.was discovering
D.had discovered
3. I think it...... tomorrow.
A.has rained
B.will rain
C.is raining
D.will have rained
4. Jane...... Vietnamese before she went to Vietnam.
A.has studied
B.was studying
C.studied
D.had studied
5. This time tomorrow we... football
A.will play
B.are going to play
C.will be playing
D.will be played
6. I.... to see him after I had heard the news
A.had hurried
B.was hurrying
C.would hurry
D.hurried
7. We....her for nearly two weeks.
A.haven't seen
B.didn't see
C.don't see
D.hadn't seen
8. I shall stay here until you..... your homework.
A.will finish
B.will have finished
C.have finished
D.are finishing
9. The teacher explained that oil.... on water.
A.floats
B.floated
C.is floating
D.had floated