It was _______pleasant surprise for the mother to see her son ____had been missing for nearly ten years that she didn’t know what to say.
There is a police car _____ the bus. The police are watching the traffic.
—Lily, here are your pens. Please _____. —OK, Mom.
—_____ do you have an art lesson? —Four times a month.
—You should ______ carefulin your work and life every day. —You’re right.
—_____ do you _____ English? —I like it very much.