【单选题】
0ur jumbo boom（）out of use for a long time.
A、is
B、will be
C、have been
D、has been
查看正确答案A、lift B、rise C、elevate D、hoist
搜题
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第3题
A、at its goose neck to such a extent B、at it's goose neck to such an extent C、at it's goose neck for such a extent D、at its goose neck to such an extent
