The old couple have three daughters，_____ graduating from the same university.
A. all of them B. all of whom
C. neither of them D. neither of whom
_____ what would happen，none of them could find a way out.
A. Left wondering B. Having left wondering
C. Leaving to wonder D. Having left to wonder
Just as the clothes a person wears，the food he eats and the friends with whom he spends his time，his house _____ his personality.
A. resembles B. strengthens C. reflects D. shapes
She didn’t mention her troubles to Mr. Li，who might have helped her ______.
A. instead B. either C. otherwise D. anyhow
Not until he left his home _____ to know how important the family was for him.
A. did he begin B. had he begun
C. that he began D. he had begun
The computer system __________ suddenly while he was searching for information on the Internet.
A. broke down B. broke out C. broke up D. broke in
