1.While he was still a (small) boy. He could sing many songs.

2.It is (difficult) to work out that math problem.

3.He (began) to leranthe allordien at the age of four.

4.The student (took part) in a city sports meeting last summer.

5.The won the first prize in his proup and recewed snchan (honor)

1.While he was still a little boy. He could sing many songs.

2.It is hart to work out that math problem.

3.He started to leranthe allordien at the age of four.

4.The student joined in a city sports meeting last summer.

5.The won the first prize in his proup and recewed snchan happyly