相關WhyIcouldn的文學知識

問題詳情： ---Why!Icouldn’tgetyouonthephonethismorning. ---We____tennisintheyardwhenyouphonedme.   A.couldbeplaying B.mustbeplaying C.musthavebeenplaying D.shouldhaveplayed【回答】 C知識點：虛擬...