Uponarrivinghome的精選

問題詳情：Uponarrivinghome，IwassurprisedtofindthepaperIhadhad________wasmissing.A．tobeprepared B．toprepareC．preparing D．prepared【回答】D[考查非謂語動詞。句意：我一到家就驚奇地發現我事先讓人準備的檔案不見了...