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第一节 单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. The car accident _____ the man of a position as a manager.
A. lost B. cost C. made D. robbed
22. He tried _____ to persuade his friends to travel with him, so he traveled alone.
A. in conclusion B. in vain C. in anger D. in trouble
22. _____the food safety, this article _____ many new solutions.
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. The car accident _____ the man of a position as a manager.
A. lost B. cost C. made D. robbed
22. He tried _____ to persuade his friends to travel with him, so he traveled alone.
A. in conclusion B. in vain C. in anger D. in trouble
22. _____the food safety, this article _____ many new solutions.
