It's OK to________an electrical appliance on so long as you are using it.
A．leave　B．make
C．turn　D．open
A
考查動(dòng)詞辨析。句意：只要你正在使用家用電器，就可以讓它開著。leave意為“使保持(某種狀態(tài)或某個(gè)位置)”，符合句意。故選A項(xiàng)。
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__小題1:__
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