單項選擇題The aircraft vanished without()

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


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1.單項選擇題There were several wet()on the wall.

A.parts
B.decreases
C.patches
D.decks

2.單項選擇題Houston experienced a()growth after the war.

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

3.單項選擇題The train's about to leave. All()!

A.aboard
B.on
C.off
D.abroad

4.單項選擇題She invited 500 people()her beautiful ship.

A.abroad
B.aboard
C.board
D.broad

5.單項選擇題He does his work carefully but he is terribly ()it.

A.careful about
B.good at
C.slow at
D.interested in