--- I haven’t got the reference book yet, but I will have a test on the subject next month.

--- Don’t worry. You ________ have it by Thursday.

A．could

B．may

C．shall

D．must

观察3、3、8、8这一组数字，不改变数字顺利，加入运算符号，将这些数字组成一个算式，使结果等于27。