开发儿童智力玩具积木:高一英语,求助!!!!1

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what do you think of the book ???
oh, excellent. it is____ worth____a second time.

worth,worthy,worth-while都为adj. 意为"值得"。
1. worth: be worth + n. 当名词为金钱时,表示"…… 值得……"
be worth doing sth. "……某事值得被做"
The question is not worth discussing again and again.

2. worthy:be worthy of +n. 当名词为抽象名词时表示"……值得……"
be worthy to be done "某事值得被做"
The question is not worthy to be discussed againand again.

3. worth-while: be worth-while to do sth "值得做某事"
worth while: It is worth while doing sth
It is worth while sb to do sth.