Who helped Mum wash the dishes yesterday? —Helen ______.

_____ 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 go to Beijing Happy Valley? —Once a year. [ ]

The room is ______ students. [ ]

________ did you write to your e-friend yesterday? — For more than half an hour.[ ]