Someofmyfriendsareinterestedin

Some of my friends are interested in science,but none of them can tell_____.

A．when UFOs will appear next time.

B．why do horses know the way.

C．where was this kind of plant found.

D．how do elephants communicate.

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your help, we can finish the task in time.

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A．if Li Hong had gone to	B．if had Li Hong gone to
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