—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
—Look at the monkeys running around on the rocks together. —Yes, the environment ______ to suit them very well. Let's see the tigers now.
—How much shall I pay for the telephone call? —You _____. It's free.
—Why did you plant so many trees? — ______ the environment.
—Can we finish the work with ______ money and ______ people? —I'm afraid it's impossible.
—Computer is so useful. It can do almost everything. —Yes, but it ______ what to do.