—Irangyouataboutnine，buttherewasnoreply．—Oh，thatwasprob...

問題詳情：

—I rang you at about nine，but there was no reply．

—Oh，that was probably         I was seeing the doctor．

A．why             B．when            C．what               D．that

【回答】

B

知識點：連詞

題型：選擇題