Dogs have a very good ______ of smell and are often used to search for survivors in the earthquake.　　　　　　　　　　　　　　　　　　　　　　　　　

—Mrs. Wang was sent to teach English in a poor mountain village last year.—She said she would never forget some pleasant      while working there.

My father’s brother is my       .

— Could you please tell me something about the two_   ?— ____. They arc exchange students of No. 1 Middle School.

---_______room is small, but it’s very nice and tidy. ---Really. Let’s go and see.