问题
选择题
| _____ you _____ many people in the zoo last Sunday? |
A. Do; see B. Did; see C. Did; saw D. Were; see |
答案
答案：B
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| _____ you _____ many people in the zoo last Sunday? |
A. Do; see B. Did; see C. Did; saw D. Were; see |
答案：B
缺失，
健康牙槽嵴丰满，口内余牙情况良好，