| A.increase | B.rise | C.decrease | D.change |
| A.in the use of the words of historical events |
| B.in the category of fear |
| C.in the category of literature |
| D.in the category of joy |
| A.A study of emotional words. |
| B.A study about vocabulary in literature. |
| C.Reasons for the use of emotional words decreases in literature. |
| D.A study on increase in the category of fear. |