第1个回答 2021-05-23
用英语语说：When we come across a problem that can't be solved, he tells us
第2个回答 2021-05-24
When we have a problem that we won't, he will tell us
当我们遇到不会的题是他给我们讲一下
第3个回答 2021-05-23
Whenever we meet some difficult problems,he will explain them to us.
第4个回答 2021-05-24
When we encountered the question of no, he told us something.
第5个回答 2021-05-23
When we have some problems,he will
explain them for us.