adj.
1) ~ to (~ to one's health)
2) ~ to + inf. (it is ~ to work at that height = it is ~ working at that height)
adj.
1) ~ to (~ to one's health)
2) ~ to + inf. (it is ~ to work at that height = it is ~ working at that height)
The Bbi combinatory dictionary of English, a guide to word combinations. Комбинаторный словарь английского языка Bbi. Руководство по словосочетаниям. 2012