Everyone should make a contribution         the environment.
#60222
A
to protect
B
to protecting
C
protects
D
protected
推荐题目
Miss Chang plans to drop by her uncle when she reaches Beijing.
#52380
A
call
B
drive to visit
C
e-mail
D
come over to
He is good at swimming.
#58186
A
goes
B
enjoys
C
learns
D
does well in
If it is dark,       the lights, please.
#61947
A
pick up
B
look at
C
turn on
D
play with