问题描述:
he said hundreds of trees__in the amazon rainforest by the end of last year
a,have been cut down
b,had been cut down
是选择第二个吧,答案可能又错了,答案是第一个,我就是想和你们高手确认一下答案,嘻嘻,
a,have been cut down
b,had been cut down
是选择第二个吧,答案可能又错了,答案是第一个,我就是想和你们高手确认一下答案,嘻嘻,
问题解答:
我来补答展开全文阅读