– We must act now because time is _________.– Yes. Let’s start.
#52168
A
coming out
B
putting out
C
cutting out
D
running out
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