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that 6. Those papermaking factories must be closed in order to prevent the water of the river ______. A. polluting B. from polluting C. being polluted D. polluted 7. ______ I’m well again, I can go on with my work. A. Even if B. As though C. Ever after D. Now that 8. The chemistry lab in our school is ______ as the physics lab. A. twice as big B. big as twice C. as big twice D. twice as bigger 9. ______ anyone should want to kill her was unbelievable. A. Whether B. That C. What D. If 10. _____ the ancient Egyptians built the pyramids puzzled people for centuries. A. Whether B. What C. How D. Where 11. _____ has helped to save the drowning girl is worth praising. A. Who B. The one C.