填:likely /able ;sure
if you work hard,you'll be (likely/able/sure ) to pass the exam.
如果你努力学习,你考试就可能/能/肯定会及格.
be likely to do sth.可能做某事
be able to do sth.能够做某事
be sure to do sth.肯定能做某事
本人认为:likely 比able/sure 更好.努力了,就可能及格,不一定肯定会及格.