问题

Every possible means ________ to prevent the air pollution, but the sky is still not clear. [ ]

A: is used
B: are used
C: has been used
D: have been used

正确答案是：

同类题型

Only latelyaboutthe dark secrets behind the seemingly-happy marriage of the golf star Tiger Woods.

Forbreakfast he only drinks juice from fresh fruit ___ on his own farm.

Can we leave the classroom now– No, you ______. You ______ to leave until the bellrings.

填入下面一段文字横线处的语句，衔接最恰当的一组是（）名著重拍应有传播民族优秀文化担当，。，，，。，其未来的发展就会像逐浪的浮萍，难以找到自己的根系。某些名著重拍对民族文化的肆意放逐，实际上反映了创作者艺术良心的普遍缺失，缺乏担当意识的名著重拍其艺术生命一般不会走得很远。①用当代文化去激活民族优秀文化②不应是肆意的精神放逐③无论是一个民族，还是一个国家，如果放弃了对优秀民族文化精神家园的坚守④故名著重拍既要守望优秀民族文化的精神家园⑤名著重拍本应该是用民族优秀文化去烛照当代文化⑥更要拥抱当代文化的新境界与新天地

Mary was much kinder to Jack than she was to the others, _______, of course, made all the others upset.