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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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推荐题目
______ it is to learn English on the internet!
#66256
A
What a fun
B
What fun
C
How a fun
D
How fun
Please do me a favor — ______ my friend Mr. Smith to Youth Theater at 7:30 tonight.
#66335
A
to invite
B
inviting
C
invite
D
invited
  ________ it is to have a swim in a pool on a hot summer.
#65877
A
How fun
B
How funny
C
What fun
D
What funny
   I wish to pay a visit to Hongkong!
#66238
A
How do
B
What do
C
What
D
How
 _____ for the young man to spit in the subway!
#65984
A
How bad manners it is
B
How bad manners they are
C
What bad manners they are
D
What bad manners it is