Whatever the cause of the heat may be, we do know that the earth gets hotter ________ down we dig．

A．further

B．the farther

C．the farthest

D．the furthest

During his race to the highest post in the US, Barack Obama called for ________ United States of America, rather than ________ white America or a black America．

A．a;a

B．/;the

C．the;a

D．the;/

She managed to save ________ she could out of her wages to help the poor villagers．

A．how little money

B．so little money

C．such little money

D．what little money

What is needed now in China’s West are men and women with skills any developing countries ________ have to survive and prosper．

A．must

B．can

C．may

D．ought

The manner in which a telephone is answered gives the image of the organization, so ________ polite and pleasant when answering the telephone．

A．being

B．be

C．to be

D．having been

With the country’s population increasing to 1.3 billion, many of China’s rivers, including the legendary Yellow River, ________．

A．is drying up

B．will be drying up

C．had dried up

D．are drying up

________ I’m into the video game, it’s hard to think of anything else．All my focus is on finishing the story line．

A．Unless

B．Once

C．Whether

D．Although

We live in a world that is changing fast, one ________ changes come at what seems to be an ever-increasing pace．

A．that

B．which

C．where

D．whose

The win in the 100-meter butterfly gives the American swimmer Michael Phelps eight gold medals in Beijing, ________ the record set by American legend Mark Spitz at the 1972 Munich Games．

A．breaking

B．broken

C．to break

D．being broken

In the 1980’s, the Walkman was hugely popular and ________ when CDs arrived．

A．so the Discman was

B．the Discman was so

C．so was the Discman

D．was so the Discman