—Could you help me with the math problem?
—________ Your must be barking up the wrong tree.
| A．A pleasure. | B．Hang on a minute. |
| C．What’s the point? | D．Are you kidding? |
It was on May 12, 2008 ______ the Wenchuan Earthquake happened.
| A．when | B．which | C．since | D．that |
Mother told me ______ near the river.
| A．don’t play | B．not to play | C．not play | D．not playing |
His friends ignored his advice, ______ they knew it to be helpful.
| A．as if | B．since | C．even if | D．so that |
I ______ along the road when I saw Peter. So we stopped and had a chat.
| A．walked | B．was walking | C．would walk | D．had walked |
Betty will ring me up as soon as she ______ in Beijing.
| A．arrive | B．arrives | C．arrived | D．will arrive |