17、We s__________(吞咽了)all our food and drink.

16、All these difficulties were caused by natural d__________(灾难).

15、You should do with the matter r__________(有责任地).

14、The two countries c__________(联合起来)against their common enemy in the past.

13、Have you ever had any a__________(冒险的)experience?

12、Her temperature has returned to n__________(正常).

11、Only a narrow strait(海峡) s__________(分隔)North America from Asia.

10、people c__________(交流)with each other by means of words.

9、C__________(相比较)with the service industry, foreign trade is more important .

8、The doctor asked me to show my t__________(舌头).