Electricity proves ________ in our ________ life.

[　　]

A. useful; everyday

B. useful; every day

C. usefully; daily

D. usefully; everyday

I'm feeling tired out. I've been on the _______ ever since eight oclocks this morning.

[　　]

However,at times this balance in nature is _____,causing a number of possibly unforeseen effects.

[　　]

Ana was reading“War and Peace”,completely __________ to the outside world．

[　　]

I'm 50 this year,but many of my friends say I don' t__________my age. Don't you think so?

[　　]

Sarah hopes to become a friend of ________ shares her interests.

[　　]

In order to look after her sick daughter,the old lady asked for a month's ________.

[　　]

If better use is _____ your spare time, you'll make good progress in doing your business.

[　　]

A．spent　　　　B．made of

C．used for　　 D．taken

_____ the day went on, the weather got worse.

[　　]

A．As　　　 B．Since

C．While　　D．With

What _____ do you have besides your pay?

[　　]

A．salary　　　B．income

C．pay　　　　D．wages