1[.单选题]I suppose they have known about it,()?
B.am not I
2[.单选题]It()him ten years to write that novel.
3[.单选题]The students are looking forward to()their holidays in Japan.
4[.单选题]They all()mentioning that girl.
5[.单选题]Human beings should find a new()of energy.
6[.单选题]The couch is comfortable to().
7[.单选题]So loudly()that all the people in the room got a fright.
C.did he shout
D.he did shout
8[.单选题]He is the only one of the sons in the family who()received high education.
9[.单选题]We think of Mr.Li()our good friend.
10[.单选题]The mountain is 1,000 feet()the sea level.