The chief reason for the population growth isn’tso much a rise in birth rates ________ a fall in death rates as a result ofimprovements in medical care.

Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly

What do you think of the _______ the MoonlightSonata by Beethoven— It sounds really wonderful

Do you know the man Li An— Yes. He is regarded as one of the directors in our country.

He asked us to __________him __________carrying through their plan.