sure这个词的用法make sure to?are sure of?are sure to?are making su

没有make sure to这个用法,只有make sure(of sth/that),“确保”的意思.
be sure of的意思是一定,必定,无疑（将会得到或发生）.be sure of sth.
be sure to的意思是一定,必定,无疑（会做或会发生）be sure to do sth.
既然没有make sure to的用法,那么第四个选项也是错的了.