Students are often warned that anyone who leaves the classroom at night must remember to _____ all the lights, or he will be fined.
A. switch off B. go off C. take off D. bring off
____ he was not rich enough to buy whatever he wanted, Edison decided to make his new laboratory the best.
A. Although B. Since C. When D. As
We still cannot persuade him to give up smoking ____ hard we tried.
A. so B. how C. though D. however
____ we went those days when we were in the countryside, we were warmly welcomed.
A. There B. Where C. Wherever D. Whatever
A ____ road goes ____ from our village to the center of the town.
A.straight;straightly B.straightly;straightly
C.straightly;straight D.straight;straight
When his mother came in, Charlie pretended _________.
A. sleep B. sleeping C. to sleeping D. to be sleeping
