our earth, or else it will be no longer fit for us to live on.
#92853
A
Protect
B
To protect
C
Protecting
D
Protected
推荐题目
The Great Wall is ________ place that millions of people pay a visit there every year.
#92047
A
so a well-known
B
a so well-known
C
such well-known a
D
such a well-known
Han Mei, I would appreciate ______ you could give me some suggestions on GRE test.
#91985
A
it whether
B
it if
C
that when
D
that if
He had little idea that it was getting so late, _____?
#93241
A
didn’t he
B
wasn’t it
C
did he
D
was it?
—Must I turn off the gas after cooking? —Of course, you can never be ____careful with that．
#93013
A
enough
B
very
C
so
D
Too