问题详情：
Our head teacher often says, “You will not pass the exam ______ you work hard.
A. if B. unless C. since D. when
【回答】
B
知识点：连词
题型：选择题
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七选五阅读There'splentyofadviceoutthereaboutwhattodotogettos...![某英文杂志正在举办“Whethershouldhighschoolstudentsstayuplatetost...]( "某英文杂志正在举办“Whethershouldhighschoolstudentsstayuplatetost...")
某英文杂志正在举办“Whethershouldhighschoolstudentsstayuplatetost...![Youknowyouhavetoread“betweenthelines”togetthemostoutofa...]( "Youknowyouhavetoread“betweenthelines”togetthemostoutofa...")
Youknowyouhavetoread“betweenthelines”togetthemostoutofa...![Theresultoftheexperimentwasverygood,]( "Theresultoftheexperimentwasverygood,")
Theresultoftheexperimentwasverygood,![—Shallwegotothesupermarketafterschool?Ineedtobuysomethi...]( "—Shallwegotothesupermarketafterschool?Ineedtobuysomethi...")
—Shallwegotothesupermarketafterschool?Ineedtobuysomethi...![综合填空：Whatdoyouusuallyusemobilephonesfor?Sendingtextmess...]( "综合填空：Whatdoyouusuallyusemobilephonesfor?Sendingtextmess...")
综合填空：Whatdoyouusuallyusemobilephonesfor?Sendingtextmess...![单项选择。Mybrotheroftenhelpsmewithmystudy，althoughheisquite...]( "单项选择。Mybrotheroftenhelpsmewithmystudy，althoughheisquite...")
单项选择。Mybrotheroftenhelpsmewithmystudy，althoughheisquite...
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