__________ you understand the rule, you will have no further difficulty.
| A．While | B．Once | C．Though | D．Unless |
Finding information in today's world is easy. The ________ is how you can tell if the information you get is useful or not.
| A．knowledge | B．ability |
| C．competition | D．challenge |
Mo Yan, a most widelyread writer, takes a complete new ________ to describing China's rural and folk culture.
| A．way | B．approach |
| C．passage | D．entry |
—Who is standing over there?
—It must be ________ from an express company.
| A．everybody | B．somebody |
| C．nobody | D．anybody |
—Would you like to go shopping with me on Saturday or Sunday?
—I'm sorry. ________ will suit me. I'll be away on business during that period.
| A．Both | B．None |
| C．Either | D．Neither |
—Can I ask you a few straightforward questions about yourself?
—Sure. I like ________ when people are open and direct.
| A．that | B．this |
| C．it | D．them |