—He is a very hard-working student.
— ______. As far as I know, he often burns the midnight oil.
A. You can say that again B. Absolutely not
C. Heaven knows D. No way
The knowledge that his friends have deserted him is a (n) ______ pill for Mr. Smith to swallow.
A. extra B. common C. bitter D. effective
Not having promoted the new digital camera successfully, the company should ______ its original marketing methods.
A. account for B. reflect on C. work out D. call up
Sometimes smiles around the world ______ be false, hiding other feelings like anger, fear or worry.
A. must B. would C. should D. can
Was it not until you began to write ______ you should have remembered more words?
A. did you realize B. that you realized
C. did you not realize D. that you didn't realize
In his lecture, the professor referred to the belief, in contrast to all other countries, ______ the elderly are wise, ______ is particularly dominant （占优势的） in the Chinese culture．
A. that; that B. that; one that C. which; which D. that; one
