问题
选择题
| You stepped into the lab with your shoes on? You're _____ to take them off before you enter it. |
A. invited B. supposed C. forbidden D. permitted |
答案
答案：B
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| You stepped into the lab with your shoes on? You're _____ to take them off before you enter it. |
A. invited B. supposed C. forbidden D. permitted |
答案：B
