选择题：It is wise to have some money _______ for old age.

题目内容：

It is wise to have some money _______ for old age.

A.put away
B.put in
C.put about
D.put down

参考答案：

Old as the car is, ___ it works quite well.

Old as the car is, ___ it works quite well. A.andB.yetC.soD.however

The boy is tall enough ___ his age. --Yes, I was much _____ when I was his age.

迄今最为重要的关于仲裁裁决在国外的承认与执行问题的国际公约是 ( )(本题2.5分)A. 《海牙公约》B. 《纽约公约》C. 《华沙公约》D. 《蒙特利尔公约》

3.下面介质中不能用作气压试验的气体是( )(本题2.0分)A. 氮气B. 干燥、洁净的空气C. 二氧化碳D. 惰性气体

若y/x+x/y=1,求y.=（）A.（2x-y）/(2y-x)B.(y-2x)/(2y-x)C.(2y-x)/（2x-y）D.(x+2y)/（2x-y）