摘要：6．A．since B．if C．because D．though
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__ we are young, we can still do something to help protect the environment.
A．If B．Since C．Because D．Though
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This dress still looks beautiful on her _____ it is last year’s style.
A．because B．though C．if D．since
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_________ we are young, we can still do something to help protect the environment．
[ ]
A．
If
B．
Since
C．
Because
D．
Though
-- May I go to the concert with you?
-- I’m afraid not ____ you have a ticket, because I have only one.
| A．since | B．if |
| C．unless | D．though |