We are writing to_______our thanks for your contribution to the blood donation d

游客2025-06-15  2

问题 We are writing to_______our thanks for your contribution to the blood donation drive.

选项 A、express
B、expressed
C、expressive
D、expression

答案 A

解析 “为了……”可以用不定式来表达。前面的writing原本是及物动词,这里省略了this letter。
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