Southwestern Ontario produces large amounts of _____.
A、beef, soybeans, and white beans
B、grain com, beef, and white beans
C、grain com, soybeans, and beef
D、grain com, soybeans, and white beans
【正确答案】：D
【题目解析】：
答案选D。Southwestern Ontario produces large amounts of grain com （maize）, soybeans, and white beans.参见教材P278。
