Some people argue using ____________ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.

    A. /; a          B . the;  the         C. the; a        D. a; a

While dancing happily at home,_______________ ．

A．the door bell rang               B．the door bell rings

C．we heard the door bell rings     D . we heard the door bell ring

The great millionaire gave away all his fortune to the charity and lived a simple life，________.

A．happy and content  B．happily and content  C．happily and peaceful  D．happy and peace

Anyone ________ bags, boxes, or whatever, was stopped by the police．

A．seen carry   B．seen carrying   C．saw to carry      D．saw carrying

—— She will finish the project within three days!

    —— ______! I could do it in three hours.

     A. You are right     B. I’m stuck C. Oh, come on      D. Don’t mention it

He got well-prepared for the job interview, for he couldn’t risk _____ the good opportunity.

A. losing     B. to lose     C. to be lost     D. being lost

This picture was taken a long time ago. I wonder if you can ___ my mother.

A find out   B pick out   C look out   D speak out

—I didn’t go to the Museum yesterday.

—Yes, but I would rather you      there too.

A．went     B．had been   C．should go   D．would have gone

In the park, the number of visitors is tightly ____ to avoid damaging the environment

or putting stress on the animals.

     A. limited     B. encouraged   C. expected        D. intended

We all hope to ________ time on the return journey by not stopping at night.

A．take up     B．make up     C．end up     D．fill up