--Can I change for a quiet room? This one is too noisy.--Sure, you can. But you need to pay for________20 dollars.
—I went to see you yesterday evening.But you weren’t in.Where were you then? —I’m sorry.I________a walk by the lake with my classmates.
While we________about Mr.Wang in the classroom,he came in.
I was doing my homework________my father was reading newspapers. A.how B.while C.if
—I was at the cinema at 9 o’clock last night.What about you? —I________at home.
—Do you know________? —This afternoon.