单项选择题

They should （）care of anchors to ensure that they are in normal condition.

A.took
B.take
C.taking
D.taken

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单项选择题

A. wait a moment
B. go
C. stand
D. Sit down.

单项选择题

-How do you do, Chief Officer!
-（）

A. How are you?
B. Fine, thank you.
C. How do you do?
D. Not at all.

单项选择题

A. all the ways
B. every way
C. this way
D. on the way