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單項選擇題

The pilot turned engine （） and is ready to take off.

A.up
B.off
C.on

你可能感興趣的試題

單項選擇題

Progress has been （） in aeroplane design.

A.done
B.made
C.produced

單項選擇題

The question was so difficult that （） people could answer it.

A.little
B.afew
C.few

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