一、用适当的状语从句的引导词填空。
1．I didn't realize how special my mother was ________ I became an adult.
答案 until
2．The thief stole the old man's purse and walked away calmly, ________ he didn't do anything wrong.
答案 as if/though
3．The police officers in our city work hard ________ the rest of us can live a safe life.
答案 in order that/so that
4．No sooner had he finished his speech ________ the students started cheering.
答案 than
5．The engineers are so busy that they have no time for outdoor sports activities, ________ they have the interest.
答案 even if/though/although
6．Hard ________ my brother studied, he wasn't qualified enough for a good university.
答案 as
7．Please arrange an interview with the manager tomorrow, or ________ it is convenient to him.
答案 whenever
