By the time he realizes he _____ into a trap, it"ll be too late for him to do an
题型：陕西省同步题难度：来源：
| By the time he realizes he _____ into a trap, it"ll be too late for him to do anything about it. |
A. walks
B. walked
C. has walked
D. had walked |
答案
举一反三
| Not only _____ the activity _____ public awareness of world hunger, but raised a lot of money for the poor children. |
A. /; has increased
B. is; increase
C. has; increased
D. /; increased |
| Great changes _____ in the last few years in China. |
| [ ] |
A. were taken place
B. had been happened
C. have been happened
D. have taken place |
| He is the only one of the students who _____ a winner of scholarship for three years. |
A. is
B. are
C. have been
D. has been |
| So far this year we _____ a fall in house prices by between 5 and 10 percent. |
| [ ] |
A. saw
B. see
C. had seen
D. have seen |
| Since my return to China, I haven"t seen my host mother in America; nor _____ from her. |
A. I heard
B. I have heard
C. did I hear
D. have I heard |
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