1 a Not many animals have a single ________ for life.
b The builder's ________ was responsible for carrying all the heavy materials.
c Hello, ________ ! I haven't seen you for ages. What have you been up to?
2 a The end-of-year exams are designed to _______ all the students in the year group.
b It's ______ stupidity to marry someone you've known for only week!
c There was a ________ smell coming from the polluted river.