---____ enjoyable day it is!Shall we go on a picnic? ----Good idea.
—Well, you are driving too fast! Didn’t you see the sign_______ over there? —Oh, sorry. I didn’t see it.
— Could you tell me __________________? — Next Sunday.
— What kind of movies do you like? — I like the movies ____ are about Chinese history.
We should never ____till tomorrow what we can do today.
David doesn’t give up _______ he has failed in the experiment four times.