Hurry up! The sky is covered with black clouds. I’m afraid it ______.
#52141
A
rains
B
is going to rain
C
rained
D
was raining
推荐题目
-- What can trees do _________ us ?--- They can _________ harmful gases and produce oxygen .
#58609
A
helping , take in
B
to help , take in
C
helping , take out
D
to help , take care
Food safety is important. Rules _____ to stop people from food pollution.
#52399
A
must make
B
must be made
C
can make
D
can be made
—I prefer______to school on foot rather than_____the crowded school bus. 
#58799
A
to go; to take
B
to go; take
C
going; to take
D
go; take