1 . ________ is obvious that he has finished his work. (用适当的词填空)

2 . ____ is a fact that English is being accepted as an international language. （按要求补全句子）

3 . — How did ________ feel to run 3,000 meters at the sports meeting?
—Terrible! Especially when I saw I was left so far ________ by others.

A．that; alone

B．it; alone

C．that; behind

D．it; behind

4 . Working as a businesswoman, Catherine admitted       it hard       between work and her family.

A．finding; balancing	B．finding; to balance
C．to find; balancing	D．to find; to balance

5 . ______ is of vital importance that we ______ something to protect our precious cultural heritage.

A．It, do

B．What, did

C．That, should do

D．Whether, will do

6 . He is rich and brave. __________ is no wonder he is popular with girls.

A．There

B．That

C．It

D．What

7 . ________ occurred to me that I had left my shirt on the playground.

A．It

B．One

C．That

D．What

8 . _______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.

A．As; whose

B．It; who

C．As; whom

D．It; whom

9 . _______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.

A．As; whose	B．It; whose
C．As; whom	D．It; whom

10 . _______ in the regulations that you shouldn’t tell other people the password of your e-mail account.

A．As is required	B．It is required
C．It requires	D．What is required