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     our earth, or else it will be no longer fit for us to live on.
#65875
A
Protected
B
To protect
C
Protecting
D
Protect
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________ a strange plant！I've never seen it before.(2011·辽宁，33)
#65907
A
Which
B
What
C
How
D
Whether
______ some housework can make your mother_______.
#59454
A
Doing; happy
B
Making ; happy
C
Doing; happily
D
Making ; happily
_____ hard and you’ll succeed sooner or later.
#59339
A
Study
B
To study
C
Studying
D
Studied
It’s a fine day. Let’s go swimming, ＿＿＿＿＿?
#66324
A
won’t we
B
will you
C
don’t we
D
shall we
----________play in class !
#59468
A
Not
B
Don’t
C
No
D
Doesn’t