--We haven't heard form Jane for a long time.  ---what do you suppose ___ to her?
#103978
A
was happening
B
to happen
C
has happened
D
having happened
推荐题目
I’ll come after the meeting if time ______. 
#104198
A
permits
B
is permitting
C
is permitted
D
has permitted
—What’s the noise outside? —The kids ______ in the garden.
#100329
A
have played games
B
play games
C
are playing games
D
are played games
A single pipeline ___________ all the houses with water.
#102223
A
is served
B
serves
C
are serving
D
serve