摘要：35．A．once B．while C．since D．unless
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________ you understand the rule, you will have no further difficulty.
[ ]
A．While
B．Once
C．Since
D．Unless
_________ volleyball is her main focus, she’s also great at basketball．
[ ]
A．
Since
B．
Once
C．
Unless
D．
While
________ volleyball is her main focus, she’s also great at basketball．
[ ]
A．Since
B．Once
C．Unless
D．While