Can you tell me ________ the robot that has caught a virus?
To________nature is to help ourselves,or we will be punished.
—Whose T-shirt is this? —It________be John’s.It’s________small for him.
—It’s difficult for village children to cross the fiver to school. —I think a bridge________over the river.
Jack________dislike the weather in Beijing in spring,because there is so much wind and sand.But now he________it.
—How much is the ticket to Central Park? —A one-way ticket________$40,and you call________another $20 for a round trip.