3 . She received many gifts for her birthday, all of ______ are thoughtful and well-chosen.(用适当的词填空)

5 . ______ is often the case, elderly people find it hard to teach themselves new skills even if they are aware that learning is a lifelong process.

A．As

B．What

C．That

D．It

6 . 我发现所有学生的注意力都集中在那张图片上了，没人在听我讲课。这让我很恼火。

I found all my students’ attention ________ on the picture and no one paid any attention to me, ________ upset me greatly.

7 . 他们这一辈子都投入到了建设乡村的事业中，这使得他们备受尊敬。(devote以及非限制性定语从句)(汉译英)

9 . Bob在学习上从不专心， 不太可能通过考试。(likely，定语从句) (汉译英)