---What do you think of Tom? ---He is ________ honest boy. He can play ________ piano very well.

I had __________ unusual experience last week.

—What about _____ English-Chinese dictionary on the bookshelf?—In my opinion, it’s _____ useful tool book for my English learning.

There is __________ “u” and __________ “n” in the word “unhappy”.

 ---Mum, where did you put my sweater?---Is it _____ black one? I put it in _____orange box near your desk.