He took off his mask and called loudly, "Beatrice! Come help me!"

VOA: special.2009.05.23

he's more than happy to help. And that helps me a lot in my studies,

他会非常乐意帮你解答。所以，他对我的学业帮助很大，

有印象的教授 - SpeakingMax英语口语达人