1.   The men who work on the oil rigs are a tough bunch.

2.   But the coaching staff is proving to be a tough bunch to please.

3.   But the database vendors are a tough bunch and are accustomed to providing a higher level of customer support, consultation and individual attention than is Microsoft.

4.   I know they can be a tough bunch, because some of their salsa verde can take your head off.

5.   These Islanders are a tough bunch to figure out.

6.   Theo hangs in, and is gaining cult status among Telegraph Hill bird-watchers, a tough bunch to impress.

7.   Tough bunch, but no fluke.