Playing computer games too often our eyes. A.is helpful to B.is harmful to C.is good for
Do you know _____?
There is _____ knocking at the door. Go and see who it is.
—What was your hometown like five years ago? —It _____ very old and dirty.
I won’t take part in the party _____ Joe invites me..
—Will you go to Jane’s birthday party this evening, Rick? —If Michael won’t, _____.