We all know the truth ________ there are air, water and sunlight there are living things. A. where B. wherever C. that D. that wherever 2. _____ is troubling me is _____ I don’t understand _____ he said A. What; that; what B. What; what; what C. That; that; what D. Why; that; which 3. It is widely ______that smoking can cause cancer. A. believed B. think C. say D. hoped 4. ____has passed the test will get a prize. A. Whoever B. No mater who C. Whomever D. Who 5. Is____ true that the famous scientist will give us a lecture next week? A that B it C his D he