摘要： New technology to make sure that the cars, taxis and trains we use the air. A. is used; not to pollute B. has used; is not polluted C. is being used; do not pollute D. has been used; to pollute [解析]选C.be used to do被用来做--, make sure后为宾语从句.缺少谓语动词.故选C.
网址：http://m.1010jiajiao.com/timu3_id_3102269[举报]
New technology ________ to make sure that the cars, taxis and trains we use ________ the air．
[ ]
A．
is used; not to pollute
B．
has used; is not polluted
C．
is being used; do not pollute
D．
has been used; to pollute
New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.
- A.is used; not to pollute
- B.has used; is not polluted
- C.is being used; do not pollute
- D.has been used; to pollute
New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.
A. is used; not to pollute B. has used; is not polluted
C. is being used; do not pollute D. has been used; to pollute
查看习题详情和答案>>