36.
(A) happy
(B) happiness
(C) happily
(D) happiest

become + adj/n

表示｢知覺｣

feel (感覺起來)、look (看起來)、smell (聞起來)、sound (聽起來)、taste (嘗起來)

表示｢變化｣

be動詞 (是)、keep (保持)、turn (變成)、become (變得)、get (變得)、grow (變得)

1. 連綴動詞 + 形容詞

This cake looks delicious.

He got good grade.

2. 連綴動詞 + like + 名詞

The perfume smells like roses.

3. be動詞 / become + 名詞

Her sister is a teacher.

He became a good engineer.

4. become / get / grow / turn 後面可以接形容詞原級或比較級，也可以用 and 連接兩個形容詞比較級

The weather is getting cold / colder. ( 天氣正在變冷 )

= The weather becomes colder and colder. 

來源：英文連綴動詞