（）____your own needs and styles of communication is as important as learning to convey your affection and emotions.
| A．Understanding | B．To be understood |
| C．Being understood | D．Having understood |
------ Our holiday cost a lot of money.
------ Did it? Well, that doesn’t matter ______ you enjoyed yourselves.
| A．as long as | B．unless |
| C．as soon as | D．though |
I was so familiar with her that I recognized her voice ______ I picked up the phone.
| A．the moment | B．after |
| C．before | D．while |
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
A. in case C. unless
C. though D. As
I toured the Great Wall，I was deeply impressed with the beautiful scenery．
| A．For the first time | B．At first |
| C．The first time | D．It was the first time |
He was about to leave the office for home _______someone knocked the door and asked for some help.
| A．until | B．while |
| C．as | D．when |