单项选择题 This is one of the most important things （） all.

单项选择题 Tom is a person who always （） up to dangers.

单项选择题 He worked in this company （） several years.

单项选择题 The （）of employees in this company has doubled.

单项选择题 The Europeans （）to stay ahead in aeroplane design.

单项选择题 Mary （） into the room.

单项选择题 The war （） in 1937.

单项选择题 She was sleeping with （） windows.

单项选择题 Mary likes living （）.

单项选择题 （） aeroplanes in this company are Boeing planes.

单项选择题 You must （）your bad habits.

单项选择题 Mary is not here. She （） to Paris.

单项选择题 This question was （）difficult that no one could answer it.

单项选择题 Hurry up，（）you’ll be late.

单项选择题 Don’t talk（）that.