The new family planning policy allows a couple to have a second birth on condition that is an only child and they have only one child.
| A．either | B．both | C．all | D．neither |
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 |