We’ll do what we can _________ our environment.
#49518
A
protect
B
to protect
C
be protected
D
be protecting
推荐题目
After finishing_______his homework, Tom decided______a walk in the park.
#49883
A
to do;to take
B
doing; taking
C
doing; to take
D
to do; taking
She tried ________ Chinese in English.
#51095
A
to not speak
B
not to speak
C
not speaking
D
didn’t to speak