—I’m afraid I can’t finish the book within this week.      

—Don’t worry.        .

A. Please go ahead             B. That’s right         C. Not at all         D. Take your time

The more one is _______ the English-speaking environment, the better he or she will learn the language.

A. exposed to                  B. filled in                C. caught on                     D. kept up

Doctors strongly recommended that my father         more exercise regularly instead of sitting still before a computer all day long.          

A. takes             B. take               C. took               D. had taken

—Did you look up the time of the high-speed trains to Shanghai?

   —Yes, the early train is        to leave at 5:30 a.m.

A. likely    B. possible         C. due     D. about

 My visit to your school is really an unforgettable experience,         I will always treasure.

A. that      B. one      C. it                 D. what

There are solid reasons for China to claim ownership of the Diaoyu Islands, which lie about 200 miles         the eastern coast of our country.      

A. to         B. on         C. off         D. of

Don’t take it seriously, Alice. I wasn’t making ______ fun of you — it’s nothing but ______ joke.

A. 不填; the      B. the; the        C. the; a        D. 不填; a

You had better ______some time every day for sports so that you can keep yourself energetic.

A. set aside       B. take up        C. put away      D. give out

The book was written ______ careful observations and detailed studies.

A. on behalf of     B. regardless of             C. on the basis of       D. in relation of

 Due to the widespread ________ of this medical technology，more diseases can be discovered and treated at an early stage.

A．presentation               B．application     C．qualification                 D．appreciation