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。 例如 : They must have finished the work. 他們一定完成那項(xiàng)工作了 。 【 學(xué)以致用 】 ① 她的確唱歌很好 。 She__________ __________ well. ② 他肯定已經(jīng)離開了 。 He__________ __________ __________ . 答案 : ① does sing ② must have left Ⅰ . 用所給詞的適當(dāng)形式填空 1. __________ (history)tried to find out the truth of the mystery. 2. The animals are used for__________ (medicine)research. 3. The__________ (lead)of the group is good at municating with the members. 4. He can’t attend the meeting because of his__________ (ill). 5. Liu Huan is one of the__________ (popular)singers in China. 答案 : 1. Historians 2. medical 3. leader 4. illness 5. most popular Ⅱ . 單項(xiàng)選擇 1. This kind of medicine can’t______flu. It’s no use. A. take B. prevent C. get D. make 2. The umbrella is used______keeping off the sunshine. A. as B. to C. for D. with 3. We like the place______the weather is always warm. A. where B. that C. what D. which 4. The Great Wall ______many centuries ago. It’s one of the symbols of China. A. builds B. built C. is built D. was built 5. Li Na is ______the pride of Chinese people, ______the pride of Asian people. A. either。 or B. neither。 nor C. not only。 but also D. neither。 or