Grace learns English by reading aloud.(改为否定句) Grace______ ______English by reading aloud.

判断题CO2 is a greenhouse gas that can make the earth warm.

单项选择题When there are black block clouds in the sky, ______.

单项选择题The author’s inspiration for the gift came from ______.

单项选择题According to the passage, collecting antique clocks ______.

单项选择题A. shouted at B. looked into C. laughed at D. played with