状语从句练习题
1. I had been looking for the book for two days____ I found it at last.
a. until b. when c. before d. while
2. He punished his students ____ they did anything wrong.
a. however b. whenever c. whatever d. whichever
3. Those passengers will wait here____ the bus arrives.
a. until b. because c. though d. as
4. Hardly had we reached home ____ it began to rain.
a. before b. than c. as soon as d. when
5. No sooner had we arrived at the cinema___ the film began.
a. than b. before c. when d. as  ...