选出盖住的正确选项，只填序号。
（）Can you stand on one foot?
Yes, ____.
| A．I can | B．I am | C．I`m | D．you are |
（）Our teacher teaches us____ a song.
| A．sing | B．singing | C．sings | D．to sing |
（）Li Ming learns to skate very ____.
| A．slow | B．long | C．fast | D．fastly |
（）It is a ____ day.
| A．snow | B．snowy | C．rain | D．raining |
（）It’s cold and snowy_______.
A. on winter B. in winter C. about winter