People develop ______ preference for a particular style of learning at ______ early age and these preferences affect learning. 

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

--- Haven’t I told you that you should be home earlier?   

  --- Yes, but I _____ home earlier than I usually do. 

 A. was coming                    B. will come                         C. came                                 D. had come 

To her joy, Della earned first the trust of her students and then _____ of her colleagues.

A. those                      B. one                     C. ones                         D. that

----Are you sure you won't come for a drink with us?

----_________, if you insist. 

A. Not at all                 B. It depends                C. All right then       D.I don't care

In much of the animal world, night is the time ______ for sleep—pure and simple. 

A. set aside                    B. set down              C. set off             D. set up

Anyone, once _______ positive for H7N9 flu virus, will receive free medical treatment from our government. 

A. to be tested               B. being tested              C. tested                       D. to test

The door _______ open, no matter how hard she pushed.

A. shouldn‘t         B. couldn't                   C. wouldn't                     D. mightn't

You can’t judge a book by its cover, ____________.     

A. as the saying goes old           B. goes as the old saying

C. as the old saying goes           D. goes as old the saying

In the global economy, a new drug for cancer, _________ it is discovered, will create many economic possibilities around the world. 

A. whatever                B. whoever          C. wherever        D. whichever

The driver wanted to park his car near the roadside, but was asked by the police _________.     

A .not to do                  B. not to            C. not do           D. do not