问题
选择题
Remember that you won't be able to cancel the contract ____you've signed.
A．before
B．until
C．once
D．though
答案
答案：C
句意:一旦签署了合同,你一定记住不能撤消。once用作从属连词，表示 “一旦……就……。
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Remember that you won't be able to cancel the contract ____you've signed.
A．before
B．until
C．once
D．though
答案：C
句意:一旦签署了合同,你一定记住不能撤消。once用作从属连词，表示 “一旦……就……。
