----Hello, may I have an appointment with the headmaster?---_____.
The boy’s dream was to have his own laboratory ________ to try out some of his own ideas.
There is a common belief among them ________ rubbish can should be put to good use.
The happy ________ of children playing in the garden disappears, and it is quiet again.
The farmer considered me as his old friend and treated me ________ some good tea.
I prefer a flat in Harbin to ________ in Beijing, because I want to live near my mom’s.