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状语从句精讲精炼05 105.The field research will take Joan and Paul about five months; it will be a long time ______we meet them again. A.after B.before C.since D.when 〖答案〗B 〖考点〗本题考查before引导的时间状语从句的用法。 〖解析〗主句为将来时态, 从句用一般现在时态表示将来。 106.He was told that it would be at least three more months______he could recover and return to work. A.when B.before C.since D.that 〖答案〗B 〖考点〗本题考查时间状语从句的引导词。 〖解析〗由It+be+时间段+before从句 “要过多久才……”可知, 此处用before。句式 “It is/has been+时间段+since从句”, 表示 “自从……以来已有……”。 107.We had to wait half an hour______we had already booked a table. A.since B.although C.until D.before 〖答案〗B 〖考点〗本题考查连词的用法。 〖解析〗句意为：尽管我们已经预订了饭桌, 但我们不得不等上半个小时。although尽管, 引导让步状语从句。 | 
