作为东西半球的分界是[ ]
A．20°E和160°W经线圈
B．任何一个经线圈
C．0°和180°经线圈
D．20°W和160°E经线圈
答案：D
Rather than ______ on a crowded bus, he always prefers _____ a bicycle.
A．ride, ride
B．riding, ride
C．ride, to ride
D．to ride, riding
