The environment is heavily polluted ____ its economy is quickly developed.

A. at which     B. where     C. which     D. to which

--- Stanly has graduated from the university.

--- It’s no wonder that I can’t see him these days. He ____ in the city for six years.

A. has stayed     B. had stayed     C. stayed     D. has been staying

Next to the pots ____ , upon which the man could work metal.

A. lay a cushion stone                B. did a cushion stone lay

C. laid a cushion stone                D. did a cushion stone lie

It was announced that ____ Chinese scientists had been able to create ____ chemical element that could fight cancer cells.

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

Write down the key words that you ____ your students to find in the passage.

A. make     B. expect     C. suggest     D. hope

____ taken away made his parents worried and they had to turn to the police for help.

A. Tom’s     B. Tom being     C. Tom     D. Tom’s being

I will call on you to see if you are ____ better.

A. any     B. some     C. so far     D. ever

____ is known, John studies in ____ is considered the best school in the city.

A. Which; which     B. What; what     C. It; which     D. As; what

Kathy has wasted so much time playing, ____ failing in the exam.

A. so     B. thus     C. and     D. otherwise

There are ____ to show that a new, different city is coming out of its dark past.

A. signals     B. marks     C. signs     D. symbols