Lin Too, open _______door,please.—I’ m coming, Mum.

It was at the very beginning ______ MrSmith made a decision _____we should send for a doctor.

Young people always look into the future, while old people like to look back into the past. This is ______ both men and women.

I catch cold now and then

1 heard ____ the book long ago, but I have never read it