Can you give me an explanation of the man－machine interface？（英译中)

Can you give me even the ___ clue as to ？

Can you give me even the ___ clue as？

— I have no idea about where to buy a present for my friend, can you give me some advi

Can you give me even the ___ clue as to where her

– Can you give me a discount if you I buy two of them？－（).

Let me give you ______.A．advicesB．some adviceC．an adviceD．the advice