His study in Peking University lasted four years, ______ he founded his own company in Hong Kong.
A. after which B. after when
C. after that D. after it
I just don’t understand _______ that prevents so many Americans from being as happy as one might expect.
A. why it does B. what it does
C. what it is D. why it is
—What do you think of _____gifted chemist from London?
— Well, sometimes his behavior is beyond ______comprehension.
A. a; the B. the; /
C. the; the D. a; /
— Did you remember to give Jack the book?
—Yes, I gave it to him ______ I saw him.
A. while B. immediately
C. once D. suddenly
— Lucy looks so upset. She ______ the driving test.
— It is the second time that she has failed in the test.
A. can’t pass
B. mustn’t pass
C. can’t have passed
D. mustn’t have passed
She tried hard to keep calm in face of the students, but the sweat on her forehead ______her_______.
A. shut; off B. turned; down
C. showed; out D. gave; away
