The policeman is still not sure ______ the young mankilled himself or was killed.

Please _______ us in the discussion. — I’d like to, but I’m _______ busy at present.

Would you please ______ theform for me ——_____________

Don’t expect too much of them．They are suffering from a_________ of money themselves．

What a pity! Considering his ability and experience, he ______ better.