B

　worthwhile值花时间（或精力）干的：1)The visit to Paris was worthwhile .2)He thinks teaching foreign languages is worthwhile.3)She has a very worthwhile job.4)I think it worthwhile to work on my stamp collection.  Worthy (of)配得上，值得：1)He is worthy of being praised.(="He" is worthy to be praised.)2)He is a worthy winner.3)She is not worthy to talk to man like you.（她配不上与你这样一位男士谈话）。