It is a long time _______they separated, but it won’t be long ____ they meet again.
| A．since; before | B．after; when | C．since; when | D．after; before |
________ the opportunity to speak at the graduation ceremony made him overjoyed.
| A．Being offered | B．To offer |
| C．Having offered | D．Offered |
Not until ________ the Internet ________ that the Chinese sailors were rescued by the European Union Task Force.
| A．did I surf; did I know | B．did I surf; I knew |
| C．I surfed; did I know | D．I surfed; I had know |
Good shoes, clothes and a backpack are the basic ________ you need for your hiking.
| A．equipment | B．instruments |
| C．tools | D．models |
The Australian boy has a good ________ of Chinese and can express himself freely in it.
| A．power | B．command |
| C．demand | D．usage |
—How can I use the equipment?
—Well, just refer to the ________.
| A．directions | B．explanations |
| C．expressions | D．introductions |