—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
— What happened?— The owner changed his mind and refused his house.
#49284
A
sell
B
sold
C
selling
D
to sell
——Let’s _ to the movies now. ——That great.
#50474
A
going, sounding
B
go, sounds
C
go, sound
D
goes, sounds
