1.   However, his third test hundred was timely, putting South Africa in a seemingly impregnable position early on in this test.

2.   It put the home team, winner of the first test, in a virtually impregnable position.

3.   England faced yet another agonising period in the first cricket Test as Australia piled on the runs and put themselves in an impregnable position here Monday.

4.   England had worked themselves into an impregnable position over Australia at lunch on the fourth day of the third Ashes cricket test here Wednesday.