2 . 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

3 . The number of medical schools reached 18 in the early 1990s and ______ around that level ever since.

A．are remaining	B．have remained
C．is remaining	D．has remained

4 . 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

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

A．reservation

B．transformation

C．distinction

D．submission

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

A．whose

B．which

C．when

D．whom

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

A．which

B．what

C．when

D．that

8 . ___________in 1931, the Empire State Building, the highest skyscraper until 1954, inspired the imagination of the world.

A．Having completed	B．Being completed
C．Completed	D．Completing

9 . The days are gone ______ physical strength was all you needed to make a living.

A．when

B．that

C．where

D．which

10 . The student completed this experiment to make come true ______ Professor Joseph had said.

A．that

B．what

C．when

D．where