—Mr. Wang __________ be in the office. The light is still on.—No, he __________ be. Because he phoned me from the farm just now.
He goes to school by bus, but he walks after school.
How can we fight _____ pollution?
“Dad,_____ you help me with my Maths homework?”said Judy.
My mum worked a whole day and was very tired.She lay in bed and soon _____asleep.
People in China enjoy _____ during the winter holiday.