Look out! The ceiling _____ l down. 
#103658
A
is to fall
B
will fall
C
is going to fall
D
is falling
推荐题目
 I am disappointed because I ________my favourite writer yet.
#99912
A
didn’t see
B
haven’t seen
C
don’t see
D
have not been seeing
Scientists found many stones ________ with numbers on the mountains.
#103097
A
marking
B
marked
C
being marked
D
have been marked
China _______ rapid progress in space technology in the last 10 years.
#101389
A
made
B
has made
C
had made
D
were making