The earth will become worse and worse ________ we do something to stop her from being polluted.
#55977
A
if
B
even if
C
when
D
unless
推荐题目
_____ he was very tired, he continued working in his office.
#55324
A
Since
B
Although
C
As soon as
D
Because
. Mary spends a lot of money on clothes _______ her family is not rich.
#58502
A
because
B
though
C
if
D
so
—What do I have to do ______ I want to be thinner?—Eat less, exercise more.
#57591
A
but
B
since
C
because
D
if