题文
＿＿＿＿＿ years ago, people first began to drink tea in China.
| A．Thousand | B．Thousands | C．Thousand of | D．Thousands of |
＿＿＿＿＿ years ago, people first began to drink tea in China.
| A．Thousand | B．Thousands | C．Thousand of | D．Thousands of |
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