單項(xiàng)選擇題

There are 65（）of grade No.3 rubber short.

A.bags
B.bales
C.sacks
D.cases

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單項(xiàng)選擇題

There are salvage operations（）position 120.0N, 12.5E.

A.on
B.at
C.in
D.above

單項(xiàng)選擇題

There are some navigational instruments（）the bridge.

A.in
B.on
C.at
D.of