-What do you think of the book -Oh,excellent.It's worth _____a second time.1、横线上为什么要填reading 而不填being read?2、second 前面为什么要用a?

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-What do you think of the book -Oh,excellent.It's worth _____a second time.1、横线上为什么要填reading 而不填being read?2、second 前面为什么要用a?

-What do you think of the book -Oh,excellent.It's worth _____a second time.1、横线上为什么要填reading 而不填being read?2、second 前面为什么要用a?
-What do you think of the book
-Oh,excellent.It's worth _____a second time.
1、横线上为什么要填reading 而不填being read?
2、second 前面为什么要用a?

-What do you think of the book -Oh,excellent.It's worth _____a second time.1、横线上为什么要填reading 而不填being read?2、second 前面为什么要用a?
be worth doing,be worth to do,be worthy of (doing)“值得”只有这几种用法
a second time是固定短语,表示“再一次”或“又一次”,"a"是不定贯词,不表特指.

worth doing,无被动
a second time 固定用法

be worth doing sth. "……某事值得被做"
The question is not worth discussing again and again.
这个句型本身具有被动,所以reading.
second 前加a是在一 又一的意思

1.词组be worth doing。
2.序数词前用不定冠词a而不用定冠词the,表示“又一,再一”的意思。
e.g.Please try a second time.请再试一次。