I won’t call you, something unexpected happensA.unlessB.whetherC.becauseD.while
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I won’t call you, __________ something unexpected happens
A.unless
B.whether
C.because
D.while
试题答案
A
unless的意思是“除非”，又如：Don’t call me unless you need help. 除非你需要帮助否则别打电话找我。Unless you change your mind, I won’t be able to help you. 除非你改变你的想法，否则我不能帮助你。