英语时态题.30.Yesterday Mary couldn't finish her homework,so she

30.Yesterday Mary couldn't finish her homework,so she has to go on _____doing_____ it this afternoon.(do)
31.We ____were playing______ football when it began to rain.We had to stop and go home.(play)
32.Xiao Lin ___has been away_______ from here for about two hours.(be away)
33.swheres____were you born______?Can you find your birth place on the map?
Sorry,I can't.(be born)
34.Last night we __didn't go________ back home until the teacher left school.(not go)
35.Comrade Li Dazhao ____was put______ in prison in 1927.(put)
36.swheresis professor Lee?
He ____have been to______ to the library.He'll come back soon.(go)
37.We could not help ___laughing_______ after we heard the story.(laugh)
38.Would you please ___bring_______ me an English-Chinese dictionary when you come?(bring)
39.He told me that he ___had visited_______ the Great Wall the year before.(visit)
40.I'll tell him the news as soon as he ____comes______ back.(come)
41.The boy _standing_________ by the door is my brother.(stand)
42.Do you remember ______seeing____ the film last year?(see)
43.There ____will be______ a physics test next Monday.(be)
44.___Must_______ I finish my homework in class?(必须)
No,you needn't.
45.I'm sorry you've missed the last bus.It _left_________ ten minutes ago.(leave)
46.Wei Fang is heard _hearing_________ English every morning.(hear)
47.John stopped ____to have______ a rest (have) because he ____had been working______ for three hours.(work)
48.I'm sorry to have kept you ___waiting_______.(wait)
49.A new theatre ____is building______ now.(build)
50.The boys _playing_________ basketball on the playground are my classmates.(play)
51.I regretted answering like that,I was sorry __doing________ so.(do)
52.Can't you see I'm busy _cooking_________?(cook)
53.He ___looked_______ worried when comingsintosthe teacher's office.(look)
54.___To_______ come beef!(随便吃点) 55.It's a great shame for me ___being laughed at_______ in front of so many people.(laugh at)