The art center is ______ used to be Factory 789 and _______ millions of tractors were made.

A. what; where B. where; where C. that; which D. where; which

_______he couldn't understand was_________more and more students showed interest in the computer games. w.w.w.k.s.5.u.c.o.m

A. What； because       B. That, what        C. What； why       D. Why； that

Why not try your luck downtown, Bob? That’s ______ the best jobs are.

A. what               B. where                C. when                 D. why

We should consider the students’ request            the school library provide more books on popular science. 

A. that   B. when   C. which    D. where 

Obama,  _______  life was once hard when he was young, were elected President of American.

A. for whom        B. who        C. to whom       D. /

It was in the factory  _______  his friend worked  _______  he picked up a lot of experience.

A. where, where                B. that, where

C. that, that                    D. where, that

I have reached a point in my life     I am supposed to make decisions of my own.

A. which  B. where   C. how  D. why

So sudden ________that the enemy had no time to escape.  21世纪教育网

His movie won several awards at the film festival, ______ was beyond his wildest dream.

   A. which B. that C. where    D. it

She brought with her three friends, none of ______ I had ever met before.

A. them        B. who        C. whom          D. these