科目: 来源: 题型:选择题
| A. | has cut down | B. | has been cut down | ||
| C. | cut down | D. | have been cut down |
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科目: 来源: 题型:选择题
| A. | finish | B. | finished | C. | have finished | D. | had finished |
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科目: 来源: 题型:选择题
| A. | Whole World Warm | B. | World Wide Web | ||
| C. | Wide World Work |
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科目: 来源: 题型:选择题
| A. | study | B. | studied | C. | have studied | D. | are studying |
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科目: 来源: 题型:选择题
| A. | left | B. | leave | C. | has left | D. | has been away |
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科目: 来源: 题型:选择题
| A. | searching | B. | to search | C. | searched | D. | search |
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