问题

_ we _______ the new policy for economy, wewould never have bought the house.

A:If ;predicted
B:Did; predict
C:If; havepredicted
D:Had;predicted

正确答案是：

同类题型

Such animals like dinosaurs died out because they could not _________ to the change of the climate.

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Students should by all means______ their studies though there are a lot of entertainments inviting them.