If you don't feel well ,you 'll __take some medicine

问题描述:

If you don't feel well ,you 'll __take some medicine
1 need 2 have to
为什么不选1

如果把need理解为情态动词的话,那么情态动词是没有将来时的
如果把need理解为实义动词(需要)的话,那么need+to do
综上所述,所以不能选need