A．crashB．polluteC．spotD．stainPlease be careful when you……

单项选择题They claimed that the news came from a ______ source.

单项选择题Writing is a slow process, requiring ______ thought, time, and effort.

单项选择题Physics is （）to the science which was called natural philosophy in history.

A．alike
B．equivalent
C．likely
D．uniform

单项选择题Young adults ______ older people are more likely to prefer pop songs.

单项选择题All the students in this class passed the English exam ______ the exception of Li Ming.

单项选择题The store had to ______ a number of clerks because sales were down.

单项选择题The newcomers found it impossible to ______ themselves to the climate sufficiently to make permanent homes in the new country.

单项选择题The car ______ halfway for no reason.

单项选择题Which sport has the most expenses ______ training equipment, players personal equipment and uniforms

单项选择题Success in the lab doesn t always mean immediate success on a large ______.