This is a process happens when land becomes desert people cut down trees and dig up grass.
#33051
A
when; because
B
that; because of
C
when; because of
D
which; because
推荐题目
Help others whenever you can________you will make the world a nicer place to live in.
#30472
A
and
B
so
C
but
D
or
The river, ________ the banks are covered with trees，is very long.
#31926
A
whose
B
which
C
of which
D
which of
_____ Mr Smith is well again, he can go on with his work.
#31397
A
Now just
B
Now and then
C
The other day
D
Now that
As best as I could determine, I was standing in _____ was once a terrible place, where they took you in and hurt you.
#31114
A
what
B
which
C
that
D
where
“Every time you eat a sweet, drink green tea.” This is _____ my mother used to tell me.
#29999
A
what
B
how
C
that
D
whether