Eric received training in computer for one year, _____ he found a job in a big company.

The two brothers once quarreled _____ each other _____ the money when their father died, and now they have made up their quarrel.

No one can ________ him in singing.He is the most popular singer among college students. [ ]

___ used ___ in a foreign country needstime .

This new kind of chemicals will help keep the air, soil and water________ from pollution.