题目内容

Susan won't arrive at the airport on time ________ she hurries up．

[　　]

A．

once

B．

C．

D．

unless

答案：D

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Susan won't arrive at the airport on time ________ she hurries up．

Susan won't arrive at the airport on time _____ she hurries up.

A. once B. if C. or D. unless

Susan won't arrive at the airport on time _____ she hurries up.

A. once B. if C. or D. unless

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