If you want to be a Friend of the Earth,you must promise the t____below.

问题描述:

If you want to be a Friend of the Earth,you must promise the t____below.

A.to read B.reading C.be read D.to reading 答案是d,请说明原因。。3q pay attention to 中的 to 是介词,后面应该跟的是动名词 pay

填reat
答案补充
treat