1 . At the Chinese art festival, there are different stands ________ artists demonstrate their skills and teach the visitors.

A．where

B．which

C．that

D．when

2 . William Hastie once suggested that history informs us of past mistakes ________ we can learn without repeating them.

A．from which

B．in which

C．with whom

D．for whom

3 . While rock-climbing, you need to remain very ________ so that you won't make any dangerous errors.

A．satisfied

B．focused

C．amused

D．delighted

4 . It is not a problem _____ we can win the battle; it’s just a matter of time.

A．whether

B．why

C．when

D．where

5 . It used to be that you ___drive for miles here without seeing another person, but now there are houses and people everywhere.

A．need

B．should

C．could

D．must

6 . Mark is a genius. By the time he graduated, he ________ jobs by a dozen computer companies.

A．has offered	B．has been offered
C．had offered	D．had been offered

7 . Dr. Rowan, ______ secretary resigned two weeks ago, has had to do all his own typing.

A．whose

B．of whom

C．of which

D．which

8 . The health security systems of many countries are undergoing considerable ______.

A．reservation

B．transformation

C．distinction

D．submission

9 . Many lessons are now available online, from _____ students can choose for free.

A．whose

B．which

C．when

D．whom

10 . We have entered into an age _______ dreams have the best chance of coming true.

A．which

B．what

C．when

D．that