be worth doing//be worth to do用法

1、首先be worth to do是错误的，正确的是be worth doing

2、be worth doing的意思是：值得做；值得做某事；值得做什么

3、意思为”值得做“的例句：

The meal cooked by Mary is worth a taste.

Marry做的饭值得尝一尝。

4、意思为”值得做某事“的例句：

I watch the movie.The movie is worth watching.

我看那部电影，那部电影值得看。

5、意思为”值得做什么“的例句：

It's not worth it.

不值得做这些。

6、It is not ____ to discuss the question again and again.

A.worth　B.worthy　C.worth-while　D.worth while
答案C. 由worth的用法可知，此句只适合词组be worth-while to do sth.。因此选C。