Now that you’re grown up you’d better spend your time just on the things you find.A. worth

问题补充：

Now that you’re grown up，you’d better spend your time just on the things you find.

A. worth doing them

B. worth being done

C. worthy of doing them

D. worthy of being done

答案：

A. worth doing them

B. worth being done

C. worthy of doing them

(答案→)D. worthy of being done

解析：考察固定搭配。固定搭配sth be worthy of being done/sth be worthy to be done某事值得被做；句意：既然你们已经长大了，你们最好多花一点时间再你们认为值得做的事情上。本句的worthy of being done作为定语修饰前面的名词the things。故D正确。