题目：请从下列选项中选择正确的词义填空。
1. The ___________ of the experiment was to test the new drug's effectiveness.
A. purpose
B. process
C. result
D. difficulty
答案：A. purpose
2. He spent ___________ on books every month, which helped him broaden his knowledge.
A. a large amount of money
B. a lot of money
C. much money
D. many money
答案：B. a lot of money
3. She always wears a ___________ when she goes out in the winter to keep warm.
A. hat
B. coat
C. shoes
D. bag
答案：A. hat
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