Helen is my friend. She is in ______ at Beijing No.11Middle School.
--- How long have you studied French?--- _______ .
---With 4G mobile phones, people can even see each other as they talk.---Really? Would you show me it, please?
---He’s never been late for school, _________ he?---_________. He always comes on time.
Some people won’t _______ the importance of their health until they lose it.
The police _________ the whole house but didn’t find any clues.