--What do you think of it?--I think it is a thing of importance that it ____ done soon.
#90140
A
is
B
is to be
C
be
D
to be
推荐题目
When a pencil is partly in a glass of water, it looks as if ____. 
#89905
A
breaks
B
has broken
C
were broken
D
had been broken
— What has happened to Tom ? — I don''t know . He ____ lost . 
#89746
A
could get
B
might yet
C
can have got
D
may have got
We      last night, but we went to the party instead.
#87198
A
must have studied
B
might study
C
should have studied
D
would study
 If you ________ home without a word, your parents wouldn't be so worried now.
#86490
A
didn't leave
B
couldn't have left
C
hadn't left
D
shouldn't leave