People begin to know that most environmental problems exist because necessary me
题型：吉林省模拟题难度：来源：
| People begin to know that most environmental problems exist because necessary measures for preventing them _____ taken in the past. |
A. are not
B. were not
C. hadn"t been
D. wouldn"t be |
答案
举一反三
| A board _____ against the wall on which these words _____, "Danger, keep off." |
A. set up; are written
B. put up; wrote
C. was set up; wrote
D. was put up; were written |
| You"ve failed to do what you _____ to and I"m afraid the teacher will blame you. |
A. will expect
B. will be expected
C. expected
D. were expected |
| After getting lost in a storm, a member of the navy team _____ four days later. |
A. rescued
B. was rescued
C. has rescued
D. had been rescued |
| The way the guests _____ in the hotel influenced their evaluation of the service. |
A. treated
B. were treated
C. would treat
D. would be treated |
— I don"t think we have met before.
— Yes, once at a party, but we ______. |
A. didn"t introduce
B. weren"t introduced
C. haven"t introduced
D. weren"t introducing |
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