The first one is more correct. But I would put it The cat'... reason why the first one is more correct than the second one is because it is...
the more correct way is to say, "use your head!" you can literally translate the sentence into use your brain, but to be grammatically correct, "use your head" is what we say in the US
...上)) expensive helpful afraid important modern honest 兩種都有 correct - correcter -correctest correct - more correct - most correct real -realer -realest real -more real -most realest 有些字雖是adjective...