2. 外语
  3. In order to use these materials for profit, you must gain formal_____from our company in writing.

In order to use these materials for profit, you must gain formal_____from our company in writing.

admin2011-04-03  13
问题 In order to use these materials for profit, you must gain formal_____from our company in writing.
选项 A、approving
B、approval
C、approved
D、approves
答案B
解析 作为动词gain的宾语，必须使用名词approval。
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