It’s well-known that ________ World Exposition in 2010 is quite ________success.A. 不填; a B. The; a The; 不填 D. 不填; the
Out of the crowded bus , who was dressed in a black suit and waved to a woman.
When exposed to stress, in ________ form, all of us react both chemically and physically.
After he was promoted to the present position, he is not so hardworking as he ______.
What actually ______ the accident has not yet been determined.
-- What were you up to when she dropped in? -- I _____ for a while and _____ some reading.