We won’t start the meeting ___ our teacher arrives.

Some of the students are nearsighted______they spend too much time watching TV or playing online games. 

—_______ is the meeting room, Mrs. Smith?  —It’s about 20 meters long and 10 meters wide.

Lily knows some Chinese, ______ she can read the words on the bottle.

—Hey, man. You can’t cross the street now. You have to wait ______ the traffic turn green.—Oh, sorry and thank you.