We reached the station ________ the train had left．
A. before
B. after
C. until
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Your grandmother____________ to the hospital at once．
A. must send
B. must be sent
C. must to be send
The writer prefers _______.
A. swimming to making money
B. making money to swimming
C. riding a bike to swimming
随着收入和价格的变化，消费者的均衡也发生变化，假如在新均衡下，各种商品的边际效用均低于原均衡状态的边际效用。这意味着( )。
A. 消费者生活状况有了改善
B. 消费者生活状况恶化了
C. 消费者生活状况没有变化
D. 无法判断
斜扳试验阳性说明
A. 腰骶关节病变
B. 髋关节病变
C. 骶髂关节病变
D. 坐骨神经病变
E. 腰椎病变
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