We don't know what we've got until we lose it,but it's also true that we don't know what we've been missing until it arrives.为什么用 have been missing,不能用别的?谢谢!
...the box before mailing it. 邮寄前他把盒子用带子捆扎好。Leave that vase alone or you’ll break it. 不要动那个花瓶,要不你会把它打了的。This matter is finished, so please don’t refer to it. 这事已结束了,所以别再提它了。请问一下:代词 it ...
...distinguishable from other types of content, and sometimes even encrypted. That makes network-based blocking hard, if not impossible.请问:(1) 第一段话的主、系、表分别是 the fastest-growing sort of mobile advertising、is、native,那后面的两个句子又是什么成分呢?(2)...