—It’s necessary ____ our environment(环境). —I agree with you.
#50553
A
protect（保护）
B
protecting
C
to protect
D
protects
推荐题目
– Would you show me ____ an e-mail , please?-- Sure.
#49699
A
how to make
B
how to send
C
which to make
D
when to send
Nick,would you mind ____________soccer here Sorry,I’ll go and play in the park．
#48428
A
playing．
B
not to play．
C
not playing．
D
to play