问题

Don‘t you think ____ necessary for friends to trust each other
A:that
B:it
C:this
D:those;
B:it
C:this
D:those;
正确答案是:
同类题型
Only when you have obtained enough data ________ come to a sound conclusion.
Alice ______ watches the newsround-up, so she knows little about the world.
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Which box is mine— Well, my box is not as yours, though they look the same.