He wrote a letter ___he explained what had happened in the accident.
A. what B. which
C. where D. when
China’s education reforms aim to better develop students’ ability to think _____.
A. independently B. steadily
C. negatively D. particularly
—Honey ,this is a present for your birthday.
— Ah ! A pair of shoes ,Nike! I think they __comfortably.
A. wear B. are worn
C. are wearing D. have worn
David is ___ animal fur ,so he won’t visit anyone who has cats or dogs in the house .
A. curious about B. allergic to
C. satisfied with D. fond of
while intelligent people can often ____ the complex ,a fool is more likely to complicate the simple .
A. sacrifice B. substitute
C. simplify D. survive
They _____ on the program for almost one week before I joined them and now we ____ on it as no good results have come out so far.
A. had been working ;are still working
B. had worked ;were still working
C. have been working ;have worked
D. have worked ;are still working
