If you have any trouble be sure to call me.-.A. I am glad to hear thatB. I will. T

问题补充：

--- If you have any trouble, be sure to call me.

---.

A. I am glad to hear that

B. I will. Thank you very much

C. I have no trouble

D. I will think it over

答案：

A. I am glad to hear that

(答案→)B. I will. Thank you very much

C. I have no trouble

D. I will think it over

解析：I am glad to hear that很高兴听到那个消息；I will. Thank you very much我会的，非常谢谢你；I have no trouble我没事； I will think it over我要好好想想。根据上文，如果你有麻烦，一定要打电话给我。结合语境可知选B最符合语境。