While listening to the concert, the audience is required to remain ______ and keep quiet.

In classes, you’d better understand as much as possible while ______ notes.

I had great difficulty      the suitable food on the menu in that restaurant.

It was __________ computer games that cost the young man a lot of precious time that he
should __________ on his lessons．

Mr. Green showed his students some photos ________ at World Expo 2010 Shanghai.

My manager told me ____ the same mistake again or I would be fired.

I prefer studying English at home ____ the match.

Along the way children ______ in long wool coats stopped ________ at us.

Two years ago, she bought an expensive mountain bike and then she _____ me _____ one.

I’d prefer __________ at home watching TV rather than ________ out.