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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— May I go to the concert with you?— I’m afraid not ______ you have a ticket, because I have only one.
#56096
A
unless
B
since
C
if
D
though
—How can I learn English well?—You will learn it well ________ you practice speaking it often.
#56660
A
unless
B
as for
C
as soon as
D
as long as
--- Does Ted tell you if he _______________ next Sunday?--- No, he does’t. But if he ________________, I’ll give you a ring.
#56868
A
will come, will come
B
comes, will come
C
will come,comes
D
comes, comes