| A．to do | B．do | C．doing |
| A．What are you doing? | B．Where are you? |
| A．What's Xiaohui doing? | B．Is Xiaohui at home? |
| A．He's listening to music. | B．He likes listening to music. |
| A．talking | B．talking to | C．taking to |
| A．他正在读一本关于中国的书。 | B．他正在读一本中文书。 |
| A．她正在和她的妹妹说话。 | B．她正在陪她的妹妹看电视。 |
| A．他正在做什么？ | B．他打算做什么？ |
| A．and | B．with |
| A．swiming | B．swimming |
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