— He ________ for tomorrow's competition at home.
A:prepares
B:is preparing
C:has prepared
D:prepared
听录音,给下面的句子排序
①Chen Jie is a helpful girl.____
②What's your friend like?____
③He can speak English and Chinese.____
④Our new music teacher will come today.____
⑤She's shy but clever.____
下列物质属于复合材料的是( )