I sawchildren in the classroom, five boys and seven girls.

You look unhappy, what’s happening, my son? —I’m wondering how long it’ll be________ we come to China again.

_____ of them knows Japanese, so I have to ask a third person for help.—You’d better ask Tom for help. He is good at Japanese.

_____ do you have an English party? — Once a month. [ ]

An old friend of my sister’s always helps my brother andwithEnglish.