---Who cleaned the blackboard yesterday, Dick?

---John ________．

---________ do you go shopping in that supermarket?

---Once a week．

---Is there ________ in today's newspaper?

---No, there's ________.

---Does Ted tell you if he ________ next Sunday?

---No, he doesn't. But if he ________, I'll give you a ring.

---Do you often see William ________ on the playground?

---No, but he is often seen ________ Chinese Kongfu in the park.

Water is all around us．Water is in the ocean．Water is in the lakes and rivers．Water is in the air．There is more water than land on the earth．All living things must have it．We must have it, too．We cannot live without drinking water．Sometimes, we do not have all the water that we need．The land will dry up without water．Sometimes, there can be too much water in the land．If it rains very, very hard, the rain water will run down the hill．It takes some of the land with it when it runs down the hills．It is called erosion when the water takes the land away．

“Erosion”in the passage means ________．

--Please tell Kate ________ it.

--Sure.