1. [单选题]食管全长主要有三处狭窄，分别在( )
A. 距中切牙约35cm处
B. 右支气管跨越食管前左方处
C. 平第三胸椎下缘处
D. 以上都对
E. 以上都错
2. [单选题]动产质押合同生效的时间为( )。
A. 质押合同签订时
B. 质押合同经出质人所在地公证机关登记时
C. 质物移交于质权人占有时
D. 主合同(master contract)履行期限届满时
3. [单选题]The driver______.
A. lived at the tavern
B. was going home after leaving the stranger at the tavern
C. was going away on the train
D. had to go back to the train station after leaving the stranger at the tavern.
