From that moment on, Jerry began to challenge the beliefs he had taken for granted before.

By the 1950s, however, industry began to challenge agriculture as a source of jobs in the rural county.

Starting around 1990, a new style of writing about testing began to challenge what had come before.

These Governments might now begin to challenge the powerful agricultural interests.

Five years ago, the Fujianese began to challenge the association's authority.

By the end of that month, public officials and colleagues were beginning to challenge his reporting.

It wasn't long before these groups began to challenge their status.

Others, like the woman earlier, were beginning to challenge his authority.

He began to challenge his father's football skills when he was 15 but lost every time.

They also began to challenge the authority of the mutaween, the religious police force.