问题

Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it canmean somebody’s life．

A:that
B:which
C:when
D:where

正确答案是：

同类题型

You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future

ieve it is the only solution to this problem. —That’s debatable, I think. I can five other solutions as good as that.

.The young ______ the vital forces inour society.

a volunteer is great.

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