What the science teacher does and says _________ of great importance to college
题型：不详难度：来源：
| What the science teacher does and says _________ of great importance to college students. |
答案
| C |
解析
| 主语从句作主语，谓动作单数；does and says 提示时态应为一般现在时。 |
举一反三
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