根据对话内容，从方框中的六个选项中选出五个合适的句子补全对话，请将句子的字母标号填写在答题卡对应的横线上。（5小题，每小题2分，共10分）
A: Good morning, Miss Li.
A: May I ask you a question?
B: 2.
A: What’s this in English?
B: 3.
A: Can you spell “cup”?
B: 4.
A: Thank you very much.
B: 5.
Mrs. Smith has _____ son and a daughter.
A. a B. an C. the
Bob is _________ than John.
A. tall B. taller C. tallest
—What are _______ teachers doing?
—They are having a meeting.
A. this B. that C. those
There are a lot _____ students on the playground.
A. of B. in C. by
My mother asked me _____ the room.
A. clean B. cleans C. to clean
