单项选择题

We won’t be able to go to the club ______ our parents give us permission.

A．although
B．nevertheless
C．unless
D．once
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单项选择题
Would you like ______ to the United States
A．trip
B．voyage
C．going
D．to travel
单项选择题
Only with your help,（） such difficulties in the field.

A. can we overcome           
B. we can overcome
C. should we overcome          
D. we should overcome
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