The boy was so tired that he fell asleep ______ his mother could take off his clothes.
It was until last year that he ______.
The boy pretended ______ his homework, when his parents came back home.
They need twenty more workers ______ their group to do the job..
In the cinema, there was an old man______ beside me.
He gets up early and reads English aloud, ___ he has greatly improved his English.