题目内容

【题目】It's difficult for us _______ the future.
A.predicting
B.to predict
C.predict
D.Predicted

【答案】B
【解析】句意：it is adj for sb to do sth，做某事对某人来说怎么样。本句中it是形式主语，指代下文不定式内容，故选B。

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