| A．you can’t | B．you don’t | C．hold on, please |
| A．write | B．writing | C．wrote |
| A．I do my homework. |
| B．I don’t do my homework. |
| C．I am doing my homework. |
| A．at | B．on | C．in |
| A．play | B．plays | C．playing |
| A．use | B．is useing | C．is using |
| A．looking | B．seeing | C．reading |
| A．listen to | B．listening to | C．listening |
| A．sings | B．singing | C．are singing |
| A．to | B．on | C．with |
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