You must watch carefully everything _____ the teacher does in class.
It was two weeks before the Spring Festival and the shopping centre was _____ with shoppers.
Many students go to school _______ the tube in Beijing every day.
Stop making noise, _______ the neighbors will start complaining.
-- How was your life in the countryside? -- It was _______ but sometimes I felt a bit _______.
-- Have you moved into your new house? -- Not yet. The rooms _______.