If he does not ( ) something,he always ( ) the teacher and finds out the answer to the question.

问题描述:

If he does not ( ) something,he always ( ) the teacher and finds out the answer to the question.
帮忙填一下,第一个括号填u开头的单词,第二个是a开头

If he does not ( understand ) something,he always (asks ) the teacher and finds out the answer to the question.
不明白的再问哟,请及时采纳,多谢!