You have to be highly competitive to do well in sport these days．

We need to work hard to remain competitive with other companies．

Graduates have to fight for jobs in a highly competitive market．

She quarrels with everything I do．

The two boys had a quarrel over a bicycle．

They quarreled with each other for the biggest apple．

When I came in, they were quarrelling about my proposal．

A career as an actor requires one hundred percent commitment．

The company’s commitment to providing quality at a reasonable price has been vital to its success．

Returning to full-time education requires a big commitment of both time and money, but it usually results in greater career success．