Ò»¡¢»ù´¡ÖªÊ¶£¨¹²25·Ö£©
I. ÔÚÏÂÁи÷¾äµÄ¿Õ°×´¦ÌîÈëÒ»¸öÊʵ±µÄ´Ê£¬Ê¹¾ä×ÓÒâ˼ÍêÕû£¬Óï·¨ÕýÈ·¡££¨5·Ö£©
1. My sister learned to skate by ________. Nobody helped her.
2. These students always sing an English ________ before class.
3. We can easily know what the weather is ________ on our smart phones.
4. If you are helpful, you can ________ on well with everyone around you.
5. The shape of the basketball is ________. That makes it easy to pass and throw.