1. There is no (water) in the (house). If (there is) some, I could (clean) the floor. A.Water. B.House. C.There is. D.Clean 2. We are looking ______ a better way to conserve the natural resources. 3. We are going to visit Ha Long Bay this summer vacation. It is one of the world natural heritages of Viet Nam. --> Ha Long Bay, which................................. 4. They haven't talked to each other for two weeks. --> They last............................................. 5. We haven't been to Hanoi for 2 years. --> It is 2..................................................... 6. I haven't seen that man before. --> It's........................................................