Sara kept the secret to ________ and nobody knew about it.

Look ! Wang Ying is standing __ the starting line.[ ]

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

How many new words are there in _______lesson?—There are only _______.

How long has the movie ________? — About half an hour .