I think history is interesting, you don’t like it.
In our school library there _____a number of books on science, and in these years the number of them ____growing larger and larger.
Sunglasses are used ________ protecting your eyes in sunny days.
Leo was late for class again. So he____ clean the classroom after school.
His wife advised him________ drinking, but he wouldn't.
That beautiful skirt is _____ cotton.