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
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The twin sisters have learned a lot ________ they came to China.
#55315
A
when
B
after
C
since
D
as soon as
— What do you think of Mary’s dress?— I think it still looks quite fashionable on her it is a style of many years ago.
#55336
A
though
B
unless
C
until
D
because
_________you don’t give up(放弃)，your dreams will come true.
#56200
A
As long as
B
As soon as
C
As well as
D
As often as