— Do you know where David is ? I couldn’t find him anywhere. — Well. He ______ have gone far –his coat’s still here.
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.