地球自转产生的地理现象是[ ]
A.四季的变化
B.昼夜长短的变化
C.太阳直射点的变化
D.昼夜交替
答案:D
David jumped_ _ _in the long jump. He won the game! [ ]
A. longest
B. farthest
C. fastest
D. highest
The plan __________just because people were unwilling to cooperate (合作).
A.broke down
B.pulled down
C.turned down
D.put