有请英语高手朋友们,俺有题请教...

有请英语高手朋友们,俺有题请教...
朋友们,帮帮俺做这些题,做对了,重赏!
21. The dog ( ) in terrible condition when we found it.
选项:
a、A. is
b、 B. has been
c、 C. would be
d、 D. was
22. The bus ( ) in five minutes. We must go now.
选项:
a、A. left
b、 B. was leaving
c、 C. has left
d、 D. is leaving
23. The last time I ( ) her, she ( )at a medical college.
选项:
a、A. was visiting, studied
b、 B. visited, studies
c、 C. visited, was studying
d、 D. was visiting, was studying
24. He's already gone home. But before he left, he ( ) all the mistakes in his translation.
选项:
a、A. had corrected
b、 B. has corrected
c、 C. corrected
d、 D. would correct
25. The number of the students who failed the chemistry examination ( ) to fifteen.
选项:
a、A. have increased
b、 B. has increased
c、 C. is increased
d、 D. are increasing
26. Last night the people found the prisoner, who had run away from the prison three days ( ).
选项:
a、A. later
b、 B. ago
c、 C. before
d、 D. after
27. It remains a question when the new classroom building ( ).
选项:
a、A. will be completed
b、 B. had been completed
c、 C. would be completed
d、 D. has been completed
28. He felt lonely and sad as if the whole world ( ) against him.
选项:
a、A. turns
b、 B. has turned
c、 C. is turning
d、 D. had turned
29. He was in poverty at the time. ( ) he wouldn't have accepted the money.
选项:
a、A. However
b、 B. Therefore
c、 C. Otherwise
d、 D. Then
30. I feel it an honor ( ) to speak here.
选项:
a、A. to ask
b、 B. to be asked
c、 C. asking
d、 D. having asked
31. Mr.Brown is said ( ) for Italy last week.
选项:
a、A. to have left
b、 B. to leave
c、 C. to be leaving
d、 D. to have been left
32. I remember ( ) her at the party last week.
选项:
a、A. to meet
b、 B. having met
c、 C. meeting
d、 D. to have met
33. Jane avoided ( ) any unnecessary information to the new schoolmaster.
选项:
a、A. being given
b、 B. give
c、 C. to give
d、 D. giving
34. ( ) white, the kitchen looks much better than before.
选项:
a、A. Paints
b、 B. Painted
c、 C. Painting
d、 D. To paint
35. ( ) what the situation would be like, they decided to keep silent.
选项:
a、A. Having not known
b、 B. Knowing not
c、 C. Not know
d、 D. Not knowing
37. Ten days ( ) long enough for Mr.Carter to finish his design. He doesn't need any more.
选项:
a、A. is
b、 B. has been
c、 C. was
d、 D. had been
38. I don't know her address, ( ) I can't write to her.
选项:
a、A. but
b、 B. or
c、 C. so
d、 D. since
39. Not until the early years of the 19th century ( ) what heat is.
选项:
a、A. man knew
b、 B. didn't man know
c、 C. man did know
d、 D. did man know
40. ( )! Let's go out for a walk along the river bank.
选项:
a、A.What a fine day
b、 B. What fine day
c、 C. How fine day
d、 D. How a fine day