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單項選擇題

The third officer（）at the telegraph and also writing on the log.

A.work
B.is working
C.are working
D.was working

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單項選擇題

There we shall call at some ports（）and discharge some cargo.

A.to loading
B.be loading
C.loading
D.to load

單項選擇題

We shall（）some ports in Canada.

A.call at
B.call on
C.call in
D.call up

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