The smoggy weather has made us realize ________ terrible problems we are faced with.

A．how B．what

C．that D．which

—How unhappy your roommate looks!

—Yes, but he's not willing to tell me what it is ________ is troubling him.

A．what B．which

C．as D．that

When the millionaire was young, he was very poor. Only by doing part­time jobs during the summer holiday ________ afford to pay his college fees.

A．he could B．could he

C．can he D．he can

So quickly ________ is a possibility today may be a reality tomorrow.

A．are science and technology advancing that

B．science and technology advancing are that

C．science and technology are advancing what that

D．are science and technology advancing that what

The Chinese government promised that under no circumstances ________ the efforts to provide universal and low­cost health care.

A．it would stop B．it might stop

C．would it stop D．might it stop

Kate had a terrible time this summer. Not a day ________ without having some unpleasantness with her sister at home.

A．she spent B．she had spent

C．did she spend D．had she spent

________ who had arrested him three times for carrying drugs.

A．Before George stood the policeman

B．Before George the policeman stood

C．Before the policeman stood George

D．Before George did the policeman stand

It was President Xi Jinping ________ visited the navy troops and urged to strengthen naval force on April 9,2013.

A．when B．which

C．that D．he

In view of the global financial crisis, every possible means ________ to stimulate the economic development in China.

A．have tried B．have been tried

C．has tried D．has been tried

—Jeremy rather than his friends ________ for the accident.

—Absolutely. He shouldn't have driven after being drunk.

A．are to be blamed B．are to blame

C．is to blame D．is to be blamed