單項(xiàng)選擇題

我們的重吊桿已經(jīng)長(zhǎng)時(shí)間不用了。()

A. Our derrick has been out of use for a long time.
B. Our heavy derrick has been out of use for a long time.
C. Our crane has been out of use for a long time.
D. Our winch has been out of use for a long time.

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