Hunger is ________ number one global health risk, so ________ WFP has organized a lot of programmes, which targets people most at ________ risk．

A．the, the,/

B．a, the,/

C．the,/,/

D．a, a, a

－Was Tom in the chemistry lab when you arrived there?

－Yes, but he ________ soon afterwards．

A．had left

B．left

C．would leave

D．has left

With the development of modern electrical engineering, we can send power to ________ it is needed．

A．however

B．whenever

C．wherever

D．whichever

It is the prevention of disease ________ the successful treatment that has led to the rapid increase of the world’s population．

A．less than

B．rather than

C．more than

D．better than

－What are the Blacks?

－Mr．Black is a teacher, and his wife is ________．

A．the other

B．the rest

C．another

D．other

While crossing the mountain area, you’d better carry a stick in case you ________ by wild animals．

A．should be attacked

B．might be attacked

C．must be attacked

D．would be attacked

“Leaves are to plants ________ lungs are to human beings,” the biology teacher said to the students．

A．that

B．which

C．what

D．whose

As is known, one of the many benefits of ________ foreign travel is learning how to cope with ________ unexpected．

A．the;/

B．/; an

C．the; the

D．/; the

Mr．Smith is coming to Beijing next Sunday．By the time he arrives we ________ here for ten days．

A．have been staying

B．have stayed

C．shall stay

D．will have stayed

－Are you able to cover 100 meters in 10 seconds?

－________．

A．Yes, it’s a piece of cake!

B．That’s all right．

C．Yes, it’s a short way．

D．You’re welcome．