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
It is known to all that every minute ____ full use of____ the lessons will benefit students a great deal.
#93529
A
which makes; studying
B
when made; to study
C
that made; to study
D
which is made; studying
The train was__________ to arrive at 11:30,but was an hour late.
#94988
A
about
B
likely
C
certain
D
supposed
