單項選擇題

（）a number of home-made nautical instruments and foreign-made meters on the bridge.

A.Have
B.Has
C.There is
D.There are

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單項選擇題

（）about 20 sq.m to be sand-blasted.

A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area

單項選擇題

（）behalf of my owners, I give you my formal notice.

A.At
B.On
C.Of
D.In