Experiments of this kind ________ in both the U. S. and Europe well before the S

题型：同步题难度：来源：

Experiments of this kind ________ in both the U. S. and Europe well before the Second World War.[     ]
A. have conducted
B. have been conducted
C. had conducted
D. had been conducted

答案

举一反三

He collected information on 1,000 people, whose IQ ________ when they were ten years old.[     ]
A. is tested
B. has tested
C. would test
D. had been tested

题型：同步题难度：| 查看答案

The nine coal miners ________ in the coal mine for 20 hours before we came to their rescue in Yanshan
County, Jiangxi Province.[     ]
A. had trapped
B. had been trapping
C. would have been trapped
D. had been trapped

题型：同步题难度：| 查看答案

He collected information on 1,000 people, whose IQ when they were ten years old.[ ]
A．is tested
B．has tested
C．would test
D．had been tested

题型：同步题难度：| 查看答案

John had to have his car repaired in a garage because it ____seriously.[      ]
A. damaged
B. was being damaged
C. had damaged
D. had been damaged

题型：同步题难度：| 查看答案

The police found that the house____and a lot of   things___.    [     ]
A. has broken into;  has been stolen
B. had broken into;  had been stolen
C. has been broken into;  stolen
D. had been broken into;  stolen

题型：同步题难度：| 查看答案