1 . Knowing ______ reduces the risks of failure and it works like an insurance policy for your own ability. (do)
知道你正在干什么，能降低失败的风险，这就像给自己的能力买了份保险。

2 . It is difficult for us to imagine_____ life was like for slaves in the ancient world.

A．where

B．what

C．which

D．why

3 . —I wonder ________ Mary has kept her figure after all these years.
—By working out every day.

A．where	B．how
C．why	D．if

4 . Students are always interested in finding out _______ they can go with a new teacher.

A．how far	B．how long
C．how often	D．how soon

5 . Do not let any failures discourage you, for you can never tell ________ close you may be to victory.

A．how	B．that
C．which	D．where

6 . As many as five courses are provided，and you are free to choose________suits you best.

A．whatever	B．whichever
C．whenever	D．wherever

7 . You have to know _____________ you’re going if you are to plan the best way of getting there.

A．what	B．that
C．where	D．who

8 . The villagers have already known ___________ we’ll do is to rebuild the bridge.

A．this	B．that
C．what	D．which

9 . The newcomer went to the library the other day and searched for            he could find about Mark Twain.

A．wherever

B．however

C．whatever

D．whichever

10 . Our teachers always tell us to believe in__________ we do and who we are if we want to succeed.

A．why

B．how

C．what

D．which