问几个关于冠词的问题1.———— of some trees is harder than that of others

问几个关于冠词的问题
1.———— of some trees is harder than that of others in the forest
A The wood B Wood
2.有没有on the other day 这个短语（区别the other day）
3._______Mr.Smith called while you were out (we don't know this man).He was in a bad temper.
A / B A
4.有没有 in bad temper,in the bad temper
5.Edison owes a larger collection of ____ books than any other students in our class.
A the B /