Perhaps the warmest 【C12】______ of the country is the southwest, which consists of the counties of Devon and Comwall. The 【C13】______ Gulf Stream flows across the North Atlantic Ocean from the Gulf of Mexico and makes the coastal regions of the 【C14】______ quite warm. Palm trees, bamboo and many semi-tropical plants grow 【C15】______ in the southwest of England. Flowers and vegetables ripen 【C16】______ a month earlier than those elsewhere. Farmers in the area obtain 【C17】______ for their vegetables and flowers because they are ready earlier. In winter there 【C18】______ several feet of snow in other parts of England 【C19】______ there will probably be no snow at all in the southwest. This may be 【C20】______ the southwest is one of England's most popular holiday areas.
【C1】______

A. there
B. that
C. it
D. which