There’s someone knocking on the door. Who _________ it be?—It must be John. He promised to be here at 8:00.

Talk to anyone in the city ______ you will find that the life of the victims in Yushu is the primary concern to the people now

下列各句中，没有语病的一句是（  ）

Detective Lu is busy writing a _____________ on the murder.

If I his advice earlier,I would not be embarrassed now