--- When did your father come back last night?--- He didn’t come back _______ he

--- When did your father come back last night?--- He didn’t come back _______ he

题型:不详难度:来源:
--- When did your father come back last night?
--- He didn’t come back _______ he finished all the work.                                                           
A.untilB.whileC.ifD.unless

答案
A
解析

试题分析:until直到;while然而,当……时; if是否,如果;unless除非,如果不;句意:昨天晚上你的父亲什么时候回来的?——直到他完成所有的工作,他才回来。结合语境可知选A。
点评:连词在句子中主要起联系上下文的作用,他们之间的区别就是表示逻辑关系的不同,所以在解题时先要理解上下文含义,然后根据上下文逻辑关系选择合适的连词。连词的用法都比较多,语义之间还有交叉,熟记其基本应用规则,了解其区别,注意固定搭配对象,是做好此类题型的关键。
举一反三
Nobody will help you________ you help yourself.
A. unless               B.  because             C. though
题型:不详难度:| 查看答案
Think it over, _____ you’ll work out the math problem.
A.orB.soC.forD.and

题型:不详难度:| 查看答案
—Susan, what are the advantages of MP5 players?
—Mom, they are smaller and lighter ______ they can be carried very easily.
A.unlessB.if C.untilD.so that

题型:不详难度:| 查看答案
—Shall we get off the bus here?
—Yes. But we won’t get off _______ it stops.
A.whenB.untilC.whileD.after

题型:不详难度:| 查看答案
Time waits for no man. But teenagers won’t realize the value of time until it’s gone. Don’t waste your time,        you will regret it.
A. and               B. or                  C. but
题型:不详难度:| 查看答案
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