问题
选择题
It would be unfair to clone any extinct animals they were to live in a zoo.
A．or
B．if
C．but
D．whether
答案
答案：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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It would be unfair to clone any extinct animals they were to live in a zoo.
A．or
B．if
C．but
D．whether
答案：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。