单根牙以_______处的牙周膜面积最大，多根牙以_______处的牙周膜面积最大，_______次之。
参考答案：牙颈部；根分叉区；牙颈部
个人理财业务是商业银行零售业务的重要组成部分，其服务对象主要为个人客户。 ( )
根据句意及首字母提示补全单词。
1. I'm afraid I can't p_____ get away tonight.
2. Lao She was a famous Chinese a_____ .
3. I hope to pass the f_____ exam at the end of the year.
4. He made an a_____ to see his doctor that morning.
5. I was a_____ to finish my work.
