用所给词的适当形式填空. The boy looks ()[happy] at his mun.He looks ()[

答案保证正确!

1. happily
副词happily修饰动词短语look at
2. happy
形容词happy放在系动词looks后面,做表语,构成系表结构.
而副词一般不能做表语



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再问： 没有at呀！
再答： 后面有at啊 第一题其实是出题人故意诱惑你，looks happily at his mum 其实是：looks at his mum happily