问题补充:
I can’t send an e-mail. Would you please teach meit?
A. how doing
B. when to do
C. what doing
D. how to do
答案:
A. how doing
B. when to do
C. what doing
(答案→)D. how to do
解析:句意:我不能发送电子邮件了。你能教我怎么发邮件吗?动词不定式表示具体的将要进行的动作,疑问词+不定式在句子中可以起相当于宾语从句的作用,故选D。