1.Henry wants to get a job doing something exciting,_____ he

1.Henry wants to get a job doing something exciting,_____ he could meet interesting people.
A.that B.which C.when D.where
我可以理解D是对的,但是为什么C不对呢?
2.Chances are quite rare _____ he has the time to enjoy a meal with all his staff.
A.when B.which C.that D.why
我觉得是C啊.