We（）our competitors by offering a better product at a lower price than theirs.

Some college students prefer to have a（）job after class...

单项选择题Some college students prefer to have a（）job after class.

The encyclopedia is （）with information about everything...

单项选择题The encyclopedia is （）with information about everything under the sun.

More than one in four American children are growing up ...

单项选择题More than one in four American children are growing up in（）-parent homes.