a tough nut in a sentence

Examples

1. Bellegarde proved to be a tough nut to crack and its 1, 000 surviving defenders only capitulated on 17 September.
2. Pakistan enjoyed territorial supremacy throughout the match against Spain, but found Spanish goalkeeper Bernardino Herrera a tough nut to crack.
3. You hit the crud out of everything you can hit and and give great effort and be a tough nut.
4. "He's a tough nut.
5. But Sen . Jim Bunning, R-Ky ., acknowledged, " This is a tough nut we are talking about right now.
6. In the 20 years after their international debut in 1976, the Americans developed a cachet as tough nuts to crack.
7. He's a tough nut.
8. When Martin suggested then that TMS would be a tough nut to crack, turns out he was being politically correct.
9. But the local phone business is proving a tough nut to crack for even the largest and best financed cable companies.
10. He didn't budge, but everyone knows he's a tough nut to crack, and this way you get credit for any future deal.