单项选择题
The author says that he is a naturalist rather than a scientist probably because he thinks he（）
A．has a great deal of trouble doing mental arithmetic B．lacks some of the qualities required of a scientist C．just reads about other people's observations and discoveries D．comes up with solutions in a most natural way
单项选择题 Girls are often ______ of snakes ( )
单项选择题 The secretary worked late into the night, ______ a long speech for the president. ( )
单项选择题 He is sitting ______ of the car with the driver. ( )
