—How many students are there in the classroom?—_________. They are all in the lab.
—Could you tell me _____? —Sorry, I don’t know.
The supermarket provides customers _____ plastic bags for free.
—Is it interesting to play computer games? —Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.
She has _____ this car for nearly ten years.
—Where are Maria and Kangkang? —They _____ England.