—Is there a fog in the evening ?—Therebe . I’ll make a phone call to find it out .A. must

问题补充：

—Is there a fog in the evening ?

—Therebe . I’ll make a phone call to find it out .

A. must

B. would

C. will

D. might

答案：

A. must

B. would

C. will

(答案→)D. might

解析：由I’ll make a phone call to find it out 可知，答话人并不肯定。故选D。