We’ll do what we can _________ our environment.
#49518
A
protect
B
to protect
C
be protected
D
be protecting
推荐题目
Parents always ask their children ___ all kinds of difficulties bravely.
#51262
A
face
B
facing
C
to face
D
faced
________ can make people healthy.
#48684
A
Doing more exercise
B
Watching TV too much
C
Going to school without breakfast
D
Going to bed too late at night