题目内容
It would be unfair to clone any extinct animals they were to live in a zoo.
| A.or | B.if | C.but | D.whether |
B
本题考查连词。Or否则;if如果;but但是;whether是否。根据题意可知句中运用虚拟语气,故用if引导。选B。
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| A.or | B.if | C.but | D.whether |