说明理由1.Did you find ______ very interesting to play Yo-Yo?A.t

1:D.it,这是固定句型：it is+形容词+to do sth；
2:A.well,修饰动词用副词,听起来很不错,用well；
3:这里需要名词,是laughter；

1.Did you find _D_____ very interesting to play Yo-Yo?
A.this B.it's C.that D.it
2.The music sounds very _B_____.I enjoy minute of it.
A.well B.beautiful C.wonderfully D.boring
3.She was very frightened to hear his _laughter_______(laugh)

1. D it 在这里做形式主语，真主语是后面的 to play yoyo 其他选项无此意义
2. B sound 是系动词，被形容词修饰。
3. laughter/laughing 没学过laughter用laughing也行，动名词做宾语

c d laighes