Question

-- You can use MSN to talk with Vivien on the Internet.
--- I know. But can you tell me ________?

A．when I can use it	B．what I can use it
C．why can I use it	D．how can I use it

Answer 1

A

本题考查宾语从句的用法，宾语从句要用陈述句语序，故排除C、D；因为use前有主语I，其后有宾语it，故不可用what引导，故选A。