----- How did you know the surprising news?----- I happened _______ the event then. A.to cov..
-----Howdidyouknowthesurprisingnews?-----Ihappened_______theeventthen.A.tocoverB.tobe...
----- How did you know the surprising news?----- I happened _______ the event then. A.to cover B.to be covering C.covering D.to have covered
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