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

本題考查賓語從句的用法，賓語從句要用陳述句語序，故排除C、D；因為use前有主語I，其后有賓語it，故不可用what引導，故選A。