Dr. Black is a professor of chemistry._______, he is a famous writer.

下列各句中，没有语病的一句是

Before the operation, the doctor had to talk to the patient in order to move her fear ________ she might die during the operation.

In all his life, Dickens wrote a large number of excellent novels, some of which ______ still popular.

phy is the study of the countries of the worldand of such things ______ the land, seas, climate, towns, and population