Question 13/15
Which is the best sentence?
The zookeepers must count every cold-blooded North-American animal in the zoo.
The zoo-keepers must count every cold blooded North American animal in the zoo.
The zookeepers must count every cold blooded North American animal in the zoo.
The zookeepers must count every cold blooded North-American animal in the zoo.
The zookeepers must count every cold-blooded North American animal in the zoo.