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Since you have promised to go with them, you keep your promise. A. can B. must C

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Since you have promised to go with them, you keep your promise. A. can B. must C

Since you have promised to go with them, you keep yourpromise.

   A. can B. must   C. willD. may

 

试题答案

答案:B

解析:

上句有既然……;下句可能有一种责任和义务,因此must正合适。