Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.<br>A:make sure<br>B:be sure<br>C:assure<br>D:believe

Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.
A:make sure
B:be sure
C:assure
D:believe

出自：海船船员证

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