—ThereisasmileonSam'sface.Hemustbe

問題詳情：

—There is a smile on Sam's face. He must be ________ that his answer is right.

    —I think so. No one did as ________ as him in our class.

A. uncertain; well  B. certain; good           C. uncertain; good       D. certain; well

【回答】

D

知識點：相似 相近詞比較

題型：選擇題