Is the street too narrow for the bus to go ___? [ ]

What do you think of the EXPO 2010？— It’s great， of course. people are going to Shanghai for the EXPO 2010.

What are you doing there?—I’m going hiking _______ the mountains. I like going there _______ vacation. [ ]

What did you do last Sunday? — I.

It is a good habit of ______ to read a few lines before going to bed.