A.He does not know how to open the computer.B.He does not know how to send an E-mail.C.He does not know how to write an E-mail.D.He does not know how to change a word.
A.He does not know how to open the computer.
B.He does not know how to send an E-mail.
C.He does not know how to write an E-mail.
D.He does not know how to change a word.