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

admin2011-04-03 12

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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