– Is your brother going to Jack’s birthday party tonight? – I am not sure. He go to the

问题补充：

– Is your brother going to Jack’s birthday party tonight?

– I am not sure. He go to the concert with his girlfriend instead.

A. ought to

B. has to

C. might

D. must

答案：

A. ought to

B. has to

(答案→)C. might

D. must

解析：可联系答.案.网客服索取。