Do you know many man-made satellites _____ space by our scientists since the mid
题型：同步题难度：来源：
| Do you know many man-made satellites _____ space by our scientists since the middle of the twentieth century? |
A. have sent into
B. were carried into
C. have been sent into
D. have been brought into |
答案
举一反三
— _____ Lin Tao has failed in the exam.
— Yes, he is always very lazy. |
A. I"ve been told
B. I"ve told
C. I"m told
D. I told |
| In the last few years thousands of films _____ all over the world. |
A. have produced
B. have been produced
C. are producing
D. are being produced |
| I like these English songs and they _____ many times on the radio. |
A. taught
B. have taught
C. are taught
D. have been taught |
— Why does the Lake smell terrible?
— Because large quantities of water _____. |
A. have polluted
B. is being polluted
C. has been polluted
D. have been polluted |
| A lot of tents, drinking water and food _____ to the homeless earthquake survivors in the past several weeks. |
A. are sent
B. were sent
C. have been sent
D. had been sent |
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