—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
—When __________ he __________ fishing?—Next weekend.
#49641
A
was; going
B
is; going
C
does; go
D
did; go
____ more information about the school, you can go to www. sjz42.com.
#49823
A
Find
B
Finding
C
To find
D
Found
---People are not allowed __________in the cinema. ---But they will allow ___________in the restroom.
#50271
A
to smoke; smoke
B
smoking; to smoke
C
to smoke; smoking
D
smoking; smoke