If you have a toothache, you should see a            .

Orange represents ________. It can cheer you up when you are feeling sad.

—Will you fix up the machine according to the ______, David ? –No problem.

－How was your interview today?－I made it! It was extremely crowded，but I had the　    　of　interviewing the famous writer in the end.

— Whose room is this? — It’s ____.