题目列表(包括答案和解析)
At last the determination and patience of the scientists _______in 1996 with a breakthrough -------- the cloning of Dolly the sheep.
A. paid off B. paid out C. paid back D. paid up
At last the determination and patience of the scientists _______in 1996 with a breakthrough -------- the cloning of Dolly the sheep.
A. paid off B. paid out C. paid back D. paid up
Only in 1996 the determination and patience of the scientists with a breakthrough at last .
A. were ; paid off B. did; pay back C. did ; pay off D. did ; pay for
Only in 1996 the determination and patience of the scientists with a breakthrough at last .
A. were ; paid off B. did; pay back C. did ; pay off D. did ; pay for
Only in 1996 the determination and patience of the scientists with a breakthrough at last .
A. were ; paid off B. did; pay back C. did ; pay off D. did ; pay for
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