單項(xiàng)選擇題

The aircraft vanished without（）

A.trace
B.trouble
C.destination
D.product

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單項(xiàng)選擇題

There were several wet（）on the wall.

A.parts
B.decreases
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單項(xiàng)選擇題

Houston experienced a（）growth after the war.

A.broad
B.mechanical
C.wide
D.spectacular