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__________________. Step2: Discussing Step3: Presenting Step4: Evaluating Step5: Testing 單項選擇 1. — Could I have another cup of coffee, Daddy? — _____ It will be hard for you to go to sleep tonight if you do. A. Better not. B. Why not? C. What for? D. As you wish. 2. Zhang Heng, one of _____ bestknown Chinese astronomers, showed a strong interest in _____ astronomy as a child. A. the。 the B. the。 不填 C. 不填 。 the D. 不填 。 不填 3. Without gravity, we _____ walk on the ground as freely as we do now. A. couldn’t B. mustn’t C. shan’t D. needn’t 4. Simon was _____ why many of his friends didn’t turn up at his birthday party. A. limited B. crashed C. spotted D. puzzled 5. Though I was tired out that evening, I _____ from falling asleep by the great pain in my knee. A. was prevented B. had prevented C. has prevented D. am prevented 6. See the model ship _____ in the pool? That’s what my father made for me la st weekend. A. float B. floating C. floated D. to float 7. Jack was in low spirits those days and his friends did all they could _____ him up. A. cheer B. cheering C. cheered D. to cheer 8. There is a peaceful and calm _____ in the country, quite different from that of a big city. A. climate B. atmosphere C. system D. situation 9. It was almost midnight when a fire _____ in the neighborhood. A. blocked out B. turned out C. broke out D. died out 10. _____ life exists on any other pla in the solar system still remains a question. A. Why B. Whether C. How D. Where 11. Most of the evidence was destroyed in the fire. _____, it would be almost impossible to prove Jim guilty. A. Anyhow B. However C. Besides D. Thus 12. _____ you have worked out the first problem, you may go on to work on the second. A. Even if B. Unless C. Now that D. Though 13. — May I have a look at your necklace? — Sure. But be _____ with it — it’s made of glass and breaks easily. A. violent B. fundamental C. gentle D. genuine 14. In my view, choosing the right bike ____