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
--- I wonder how much you charge for your service. --- The first two are free ______ the third costs $30.
#32246
A
while
B
until
C
when
D
before
(2014·四川巴蜀名校联考)—I’m worrying about the coming examination.I’m afraid I cannot pass it.—________！I’m sure you’ll make it.
#30039
A
Go ahead
B
Good luck
C
No problem
D
Don’t lose heart
This building is both a secret and a mystery. No one shall be admitted into it ______ he can give the right password.
#32225
A
if
B
as
C
since
D
unless
— What should I wear to attend his wedding party?— Dress _______ you like.
#80086
A
what
B
however
C
whatever
D
how