_______which direction should we go, west or east?[ ]
A. On
B. To
C. In
D. Under
答案:C
The 2010 World Expo _____ in Shanghai attracted more than 70 million visitors from home and abroad. [ ]
A. holding
B. held
C. to be held
D. to have been held
下面四幅图的虚线是水平运动物体的原始方向,实线是偏转方向。图中正确的是()
A.
B.
C.
D.