We are disappointed why _______ few students could make _________ a wise decision.

I see you go running every morning.- Yes. To lose weight, I decide to exercise _______. Wish you good luck!

This is _______ pen.

Did you read a book about customs last week?– Yes, I found ______ very useful to know the customs of foreign countries.

________ you turn down your radio, please? –Yes, I can.