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Go and when the train is leaving. [ ] A.be sure B.make sure C.be sure of D.be su

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Go and when the train is leaving. [ ] A.be sure B.make sure C.be sure of D.be su

Go and ________ when the train is leaving.

[]

A.be sure

B.make sure

C.be sure of

D.be sure that

试题答案

答案:B

解析:

make sure意为“确信,确保”。