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

考查宾语从句。tell后跟双宾语。宾语从句用陈述句语序，排除C、D；B项中的what是use的宾语，it多余。故选A。