---We can use QQ to talk with each other on the Internet.
---Really? But can you tell me _______it.
A.how I can use | B.how can I use | C.why can I use | D.when I can use |
---We can use QQ to talk with each other on the Internet.
---Really? But can you tell me _______it.
A.how I can use | B.how can I use | C.why can I use | D.when I can use |