31. There was a teapot shaped like a duck, out of ____open mouth the tea was supposed to come.
184. In no time the locusts came down and started eating everything --- the wheat, the corn, the grass and even the _____ on the tree.
183. Hearing the funny speech given by the famous professor, all of us burst into _____.
182. To the sea captain’s surprise, he found thattravel could also be quite pleasant.
181. In the hospital, there are a lot of _____.
180. There is a _____ of understanding between them. Otherwise, they will be good friends.