employ your time和make use of your time

问题描述:

employ your time和make use of your time
(1) I think you could ( ) your spare time better.
a.employ b.hire c.take d.share
(2) I think you'd better ( ) your spare time better.
a.employ b.hire c.make use of d.share
第一题我知道选a 正确答案也是a
可是第二题正确答案是C.谁能告诉我为什么,
我的意思是为什么第一题用employ 第二题不用employ

I think You could employ your spare time better.我想你可以更快乐地过你的课余时间.
I think you'd better make use of your spare time better.我想你可以更有效的利用你的课余时间.