Will they send their homework the teacher e-mail ?-Yes they will. A. to b

问题补充：

----- Will they send their homework the teacher e-mail ?

--- -Yes , they will.

A. to , by.

Bat,with.

C. for ,by

D. by , to

答案：

(答案→)A. to , by.

B. at,with.

C. for ,by

D. by , to

解析：to到，向；by通过，到……为止；with伴随，用；at在时间空间的一点。句意：他们通过电子邮件把作业发送给老师吗？——是的，他们会的。结合语境可知前一空用介词to表示发送的对象，后一空用by表示方式，故选A。