life began on the earth is one of the biggest puzzles to scientists.

A．How　　　 B．What　 C．Where　 D．That

He tried hard to keep calm in face of the policemen but the sweat on his forehead _____ him _____.

A. gave; away　　 B. turned; down　　 C. showed; out　 D. shut; off

I have enjoyed my visit here. I’ll be very sorry __________.

　 A. for leaving　 B. of leaving　　 　 C. to leave　　　 D. left

This is an order, you have no right to refuse it; just_________ .
A. work it out                      B. carry it out
C. put it away                      D. set it up

3 Gas is one of the modern ________ (便利)the newly built apartment building provides.

Even on a cold day he prefers ______ out to play football ______at home．

A．going;rather stay　　　　　　　　　　　　　　　 B．going;to staying

C．to go;rather than staying　　　 D．to do;rather than to stay

___ more attention,the trees could have grown better.

A.Given 　　　　 　 B.To give 　　　　

C.Giving 　　 　 D.Having given

—I’d like to buy ________ book recommended by our English teacher.

—But I don’t think it ________ good one.

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

Was it in this house　　 you were born?

A、which　　 B、where　　 C、that　　 D、in which

There is a(an) ______ that more graduates choose teaching as their permanent careers.

A．direction B．attraction　 C．tendency D．attempt