The ______(call)hung up before I could answer the phone
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The______(call)hungupbeforeIcouldanswerthephoneThe______(call)hungupbeforeIcouldanswerthephoneThe___
The ______(call)hung up before I could answer the phone
The ______(call)hung up before I could answer the phone
The ______(call)hung up before I could answer the phone
calling
call为动词,calling是名词,该空应填名词