问题
选择题
Computers are so popular in our country that every pupil knows _____ e-mails.
A．how can he send
B．how does he send
C．how to send
D．how sending
答案
答案：C
本题know后跟的是从句，应该用正常顺序，故不选AB，在英文中，可用疑问词+动词不定式to do代替从句，故本题选C。