题目内容
Ninety percent of the trees _______ now, so we'll have enough wood in a few years' time.
[ ]
A. will be saved B. has been saved
C. are being saved D. have been saved
答案:D
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题目内容
Ninety percent of the trees _______ now, so we'll have enough wood in a few years' time.
[ ]
A. will be saved B. has been saved
C. are being saved D. have been saved