When you decide to start a family, you make a/an ________ to them．You shouldn't turn your back on the people who love you．

A．contribution

B．commitment

C．devotion

D．effort

It is believed that high achievers work toward personal standards of excellence ________ material rewards．

A．other than

B．or rather

C．rather than

D．or else

In order to keep healthy, he ________ an hour every day to take exercise．

A．set up

B．sets down

C．sets aside

D．set out

Holiday is ________ time for leisure．But making good use of ________ time is not an easy task for most people．

A．the; the

B．a; the

C．the; a

D．不填；不填

The airport ________ next year will help promote tourism in this area．

A．being completed

B．to be completed

C．completed

D．having been completed

Nowadays people are more concerned about the environment ________ they live．

A．what

B．which

C．when

D．where

________ which university to attend, the girl asked her teacher for advice．

A．Not knowing

B．Knowing not

C．Not known

D．Known not

He was so busy．He cannot afford enough time with his son ________ he wants to．

A．even if

B．as if

C．because

D．before

________ you said at the meeting describes a bright future for the company．

A．When

B．How

C．What

D．That