（）We don't know ______.A.how to do B.which to do C.what to do D._英语解答

（）We don't know ______.A.how to do B.which to do C.what to do D.where to do

人气：198 ℃　时间：2019-08-22 10:52:02

解答

C
A与D中的HOW ,WHERE 都是疑问副词,不能作宾语,故排除,而B中的WHICH后应该有名词,也错