ny cases about football violencerecently!—Yes, it is difficult to let the footballfans keep _____.

The girl had hardly rung the bell the door was opened suddenly, and her friend rushed out to greet her

r is new in the community will soon tothe new environment, as everybody here is friendly and helpful.

A housing bubble is an economic situation _____occurs when house prices rise much too fast.

下列各句中，没有语病的一句是（ ）