The students busily when Mrs White went to get a book she in the classroom.A、had written; leftB、were writing; has leftC、were writing; had left
The price of this camera is quite _____ . I don’t have enough money to buy it.
---How do you study English?--- _____ watching English movies.
My brother has ___ come here, but my sister hasn’t ____.
—I have many books to read these days.—Me, too.
—Dad, can I go out?—Yes, but please be careful not to play on the street when there are too many cars.