. They are teachers and don't realize the basic/primary rules and principles _____ to start and run a company.
| A．in which | B．for whom | C．with which | D．of whom |
Remember me to your parents when you _____ them.
| A．are calling | B．call | C．will call | D．have called |
_____ time, the teacher had us do half of the exercises in class and complete the other half for our homework.
| A．To save | B．Save | C．Saving | D．Having saved |
When _____ about one of the biggest concerns today, many citizens mentioned the sharp rise in housing price.
| A．asking | B．to ask | C．asked | D．having asked |
The purpose of the article is to draw public attention _________ the problem.
| A．to | B．on | C．in | D．for |
The movie Gravity won seven awards at the Oscar night, _____ was beyond the director’s wildest dream.
| A．which | B．that | C．where | D．what |