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。
