There are eight tips in Dr.Roger's lecture on sleep, and one of them is: to bed early unless you think it is necessary.
-Which would you like, rice or noodles? --_______is OK. I'm hungry.
I don't think it very expensive to buy a family computer here. -- Really? I'll buy _______ next week.
Lucy knew nothing about it ________ her sister told her.
He walked ________ fast for us ________catch up with.
_______ my mother ________ my sister watches TV plays these days.