Scientific research results can now be quickly_____ to factory production.
| A．used | B．applied | C．tried | D．practiced |
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 |