You ______ be polite to the old man.

Sally used to be ______, but now she enjoys meeting and talking to new friends.

Your MP4 is quite cheap. Where did you buy ________? I want to buy ________, too.

＿＿＿＿＿＿ shall we have to go? —— Another five miles.

The Great Wall is __________ tourist attraction that millions of people pour in every year.