--You have dropped ____ “s” in the word “necessary”.-- Oh, yes, ____ letter “s” should be doubled.A. a, an B. an, an C. an, the
Tom finds _________ difficult to learn Chinese well.
—What _______ you do if you _______ 5 million yuan?— I’d travel around the world.
It’s cold outside. You need to _______ your sweater before you go out.
—Tom, how do you practice your spoken English?— Oh, I do it reading aloud every morning.
— How do you often go to work?—I ________ go to work by bus, but now on foot.