Question

8. The young man        paid no attention to the outside world (involve)

这位年轻人专注于学习，丝毫没有注意到外面的世界。

Answer 1

8. (who was) involved in studying be involved in 为固定搭配,意为"专心致志于，忙于"，相当于be busy with或be occupied in。注意此处可用定语从句或过去分词短语作后置定语。