---Can people drive after drinking a glass of beer?---No. According to the law they _________.

—         you speak Chinese, Miss Green?— Yes, I can.

--Listen! Kate is playing the piano in the next room.　　--It _______________be Kate. She has gone to Hangzhou to visit the Cross-sea Bridge.

The post office is about 1 kilometer __________.

You'd better take a heavy coat. Sometimes it ______ be very cold.