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C. quiet D. be quiet 3. We the climbers at the top of the hill. A. came up B. came up with C. came up to D. came with 4. Now many countries of the world grow rice than . A. many, ago B. more, ago C. many, before D. more, before 5. Dr Bethune worked very hard to rest. A. without stop B. without stopping C. without to stop D. with stop 6. it’s difficult to make her dream e true, she never gives up. A. Though B. Unless C. Because D. If 7. You have to leave now you can catch the early bus. A. so that B. as soon as C. because D. if 8. Yang Liwei the space programme because he wanted to be an astronaut. A. joined B. took pa