–Jane you’ve made such great efforts that you are to pass the exam.– It is very kind of

问题补充：

–Jane, you’ve made such great efforts that you are to pass the exam.

– It is very kind of you to say so, Mr. Smith.

A. easy

B. bound

C. possible

D. unlikely

答案：

A. easy

(答案→)B. bound

C. possible

D. unlikely

解析： be bound to do sth一定、必定做某事，相当于be certain to do sth。句意：你下了这么大工夫, 一定能考及格。be easy/possible to do sth一般不用人作主语；unlikely与句意不符。