—Wow,youhaveareallygoodvoice．I         youweregoodatsin...

問題詳情：

—Wow, you have a really good voice．I          you were good at singing．

—Thank you．

A．haven’t known        B．don’t know       C．didn’t know       D．hadn’t known

【回答】

C

知識點：動詞時態與語態

題型：選擇題