______ he had broken the record, he would be a world-famous runner now.
A．When B．BecauseC．IfD．Though
C
考查連詞。根據(jù)題中已經(jīng)用了過去事實(shí)相反的虛擬語(yǔ)氣，故用if來引導(dǎo)，選C。
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