问题描述：
It's nice to go for a walk ______ a summer evening.
A)on B)in C)at D)during
A computer can only do _____ you have told it to do.
A)how B) when C)sicne D)before
Why do you want another job _____ you've got this one?
A)which B)that C)where D)when
A)on B)in C)at D)during
A computer can only do _____ you have told it to do.
A)how B) when C)sicne D)before
Why do you want another job _____ you've got this one?
A)which B)that C)where D)when
问题解答：
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