第 1 题 · 四级
The harbour is an important naval base, which the navy uses every day.
核心词：naval ˈneɪvl adj. 海军的
这个港口是重要的海军基地，海军每天都使用。
一般现在时主系表 + which 从句短语 a naval base短语 a naval officer
The harbour is an important ___ base, which the navy uses every day.
第 2 题 · 四级
I am terribly sorry to have kept you waiting, which I did not mean to do.
核心词：terribly ˈterəbli adv. 非常，可怕地
很抱歉让你久等了，我并非有意如此。
一般现在时be sorry to have done + which 从句 + mean to do短语 be terribly sorry短语 keep sb waiting
I am ___ sorry to have kept you waiting, which I did not mean to do.
第 3 题 · 四级
The radio station transmits news every hour, which drivers listen to on the road.
核心词：transmit trænzˈmɪt v. 传送，发射
电台每小时播报新闻，司机们在路上收听。
一般现在时主谓宾 + which 从句 + listen to短语 transmit information短语 transmit live
The radio station ___ news every hour, which drivers listen to on the road.
