—I called you at 4∶00 yesterday afternoon. But there was no answer. Wherewere you?—I in the supermarket.A、am shoppingB、do shoppingC、was shopping
Jim with his teacher ______ over there.
—How many ______ are there in your school? —There are twenty-one.
—What _______ animals do you like? —I like koalas.
________ people________ walking along the beach.
_________ great fun it is to go boating in such fine weather !