He ________ the exam, but he was too careless.
A. could have passed B. couldn’t have passed
C. must have passed D. may have passed
These chairs may look good, but they’re very un-comfortable _____.
A. to sit on B. to be sat on C. sit on D. sitting on
Do you prefer_____when your boss takes an interest in your personal life?
A. this B.不填 C. that D. it
When the clock ________ 11, I was about to leave for the supermarket.
A. knocked B. hit C. beat D. struck
Famous physicists from all over the world came to the US to ______the 100th anniversary of Albert Einstein’s birth.
A. congratulate B. celebrate C. applaud D.participate
So______that many parents are too worried to let their children travel alone at the beginning of the new term.
A. is the distance great B. great the distance is
C. the distance is great D. great is the distance
