what this means is that if you study all the time you will become a boring person.__①__
you must go out ,otherwise you will
lose your friends.__②__
no one wants to be friends with someone who only
talks about work and study.___③_
try to remember what the work you do is for yourself.__④__
no one could be happy in studying seven days in a week._⑤_
①为什么这里虚拟语气可以用"will"
②otherwise后面为什么可以用will
③为什么这里不将who改为whom
④为什么这里不可以讲do改为done,而是讲what改为that
⑤为什么这里可以用"in a week"
而不是seven days a week?
另外,为什么这里要讲could 改为can?