Icalledyouatfouryesterdayafternoon，butnobodyanswered．I ...

問題詳情：

I called you at four yesterday afternoon，but nobody answered．

I            in the yard at that time

A．have worked        B．will work        C．was working      D．had worked

【回答】

C

知識點：動詞時態

題型：選擇題