At the foot of the hill you could hear nothing but the ________ of the running water.
Jay Chou is-_______a pop singer. W e all like his songs.
Don't forget ________ the letter to your friend.
当别人称赞你时, 你应该说: “____”。
当你被介绍认识某人后, 你应该说: “____”。
—What ____ is Jane in? —She is in ____ Six.