语法词汇练习 语法大全 语法详解 英语听力 
We must do everything we can          waste water from running into rivers.
#48694
A
keep
B
kept
C
to keep
D
keeping
下一题
推荐题目
—This pair of shoes _________really big for me. —Why not try another _________?
#48586
A
is, pair
B
are, pair
C
is, one
D
are, one
He preferred to sit rather than_______.
#48715
A
sleep
B
sleeping
C
to sleep
D
asleep
How kind you are!You always do what you can______me.
#49506
A
help
B
helping
C
to help
D
helps
They promised        your minds        , or you will get your money back.
#50255
A
change; successful
B
to change; successful
C
change; successfully
D
to change; successfully
Could you please ________ such a thing again?
#50730
A
not to do
B
don’t do
C
not doing
D
not do