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單項(xiàng)選擇題

The officer of the watch（）a good lookout on the bridge.

A.keep
B.keeping
C.keeps
D.is keeping

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In the afternoon he often removes rust or（）some paint work.

A.do
B.did
C.does
D.to do

單項(xiàng)選擇題

Smith always（）a lot of things to do during the voyage.

A.has
B.have
C.there is
D.there are