— Who’s that lovely girl?
— You mean ______ girl with long hair? That’s Kate.

This is ______ empty bottle. Could you give me______ full one?

— Did you get here by ______ bike ?
— No, I took ______ taxi.

The scientists from ______ United States live in ______ Ninth Street.

It's not ______ good idea to drive for four hours without ______ break.

We clean our______ everyday.

The thief ran _____ yesterday.

There is ______ report in today’s newspaper. It’s about _____ sports meeting that will be held in Weihai .

（2011广东）某养鸡场计划购买甲、乙两种小鸡苗共2000只进行饲养，已知甲种小鸡苗每只2元，乙种小鸡苗每只3元．（1）若购买这批小鸡苗共用了4500元，求甲、乙两种小鸡苗各购买了多少只？（2）若购买这批小鸡苗的钱不超过4700元，问应选购甲种小鸡苗至少多少只？（3）相关资料表明：甲、乙两种小鸡苗的成活率分别为94%和99%，若要使这批小鸡苗的成活率不低于96%且买小鸡的总费用最小，问应选购甲、乙两种小鸡苗各多少只？总费用最小是多少元？

He has two sons, one is a doctor, _____ is a student.