Everyone should make a contribution         the environment.
#60222
A
to protect
B
to protecting
C
protects
D
protected
推荐题目
Why don’t you _____ us to _____ the speech contest?
#61790
A
join, join
B
take part in, take part in
C
take part in, join
D
join, take part in
You________such clothes because you are still a student.
#53192
A
aren’t allowed to wearing
B
aren’t allowed to wear
C
aren’t allowed wearing
D
don’t allow to wear
He prefers ______ at home reading to ______ out shopping on Sundays.
#61714
A
to stay, going
B
to stay, go
C
staying, going
D
staying, to go