Mr. Smith, ______ in the factory for thirty years, is on the way back to his village.
A. to work B. working
C. to have worked D. having worked
—How was that?
—I was chatting on line _____ the power went out.
A. because B. while C. as D. when
Our teacher always speaks slowly and clearly in class _____.
A. so as to be understood B. to have understood
C. so as to understand D. to understand
—Are you satisfied with the answer?
—Not at all. It couldn't have been ______.
A. worse B. so bad
C. better D. the worst
By the time Mr Wang returned home from Beijing, his son's wedding _______.
A. ended B. has ended
C. had been ending D. had ended
So _______ that everybody wants to take a photo with him.
A. a wellknown man he is
B. wellknown he is a man
C. a wellknown man is he
D. wellknown a man is he
