It was along the Mississippi River ________ Mark Twain spent much of his childhood．

A．how

B．which

C．that

D．where

The meal over, the managers went back to the meeting room to ________ their discussion．

A．put away

B．take down

C．look over

D．carry on

She ________ have left school, for her bike is still here．

A．can’t

B．wouldn’t

C．shouldn’t

D．needn’t

To know more about the British Museum, you can use the Internet to go to the library, or ________．

A．neither

B．some

C．all

D．both

________ their hats into the air, the fans of the winning team let out loud shouts of victory．

A．To throw

B．Thrown

C．Throwing

D．Being thrown

－I just can’t stop worrying about the result of the job interview．

－________．There’s nothing you can do now but wait．

A．Relax

B．Go ahead

C．Go for it

D．Good luck

My brother is really ________．He often works in his office far into the night．

A．open-minded

B．hard-working

C．self-confident

D．warm-hearted

We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold．

A．since

B．if

C．unless

D．until

Stand over there ________ you’ll be able to see it before．

A．or

B．and

C．but

D．while

A cough is usually nothing to worry about unless it lasts for ten days ________．

A．or more

B．instead

C．at most

D．only