問題詳情：
Mike ________ his computer and checked his e-mail.
A. turned on B. turned off C. turned up D. turned down
【回答】
A
詞彙辨析題。看*四個詞組的詞義，A. turned on 開啟，B. turned off 關掉，turned up加大音量，D. turned down 縮小音量。句義應爲“Mike開啟電腦，檢查他的e-mail.” 故選A。
知識點：動詞和動詞短語
題型：選擇題
