问题
补全对话，情景问答
填空。
1. —______ , Lucy!
—Hello, Mary!
2. — Hi, Jim!
— ______ , Li Lei!
3. —Lucy, please sit down.
—______ ______ .
4. —Your English is very good!
—______ ______ .
5. —Goodbye, Mum!
—______ , Lingling!
答案
1. Hello 2. Hi 3. Thank you 4. Thank you 5. Goodbye
小体成因的叙述，正确的是