问题

_____with so muchtrouble, we failed to complete the task on time.
A:cut off
B:Theyare sure to enjoy a longer and happier life
C:Theyhave lived long enough to read this article
D:To face
B:Theyare sure to enjoy a longer and happier life
C:Theyhave lived long enough to read this article
D:To face
正确答案是: