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
Although he is considered a great writer, _____.
#94562
A
his works is not widely read
B
but his works are not widely read
C
however his works are not widely read
D
yet his works are not widely read
________full use of the chance, or you will never achieve your dream of overseas study.
#92249
A
Making
B
To make
C
Make
D
To be made
I haven’t seen her ____ the time ____ she had the accident.
#94977
A
for; that
B
since; when
C
since; as
D
for; when
___ is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．
#93671
A
As
B
It
C
What
D
That