Don’t  forget to _______ the lights when you  leave the classroom.
A.turn onB.turn offC.turn upD.turn down
B
考查詞語(yǔ)辨析。
1. turn on意為“打開(電燈、自來(lái)水、無(wú)線電等)”。如: Please turn the electric fan on.請(qǐng)打開電風(fēng)扇。
2. turn off意為“關(guān)閉(水源、煤氣、電燈等)”。如: Don’t forget to turn all the lights off before you come up to bed.你上樓睡覺(jué)之前,不要忘記把所有的燈都關(guān)上。
3. turn up是指將音量調(diào)大些。如: Turn the radio(a little)up so that the students at the back can also hear clearly.請(qǐng)將收音機(jī)音量(稍微)開大點(diǎn),以便后排的學(xué)生也能聽清楚。
4. turn down意為“關(guān)小點(diǎn)(些)”,而不是完全關(guān)掉(turn off)。如: We usually turn down the heat before going to bed.睡覺(jué)前我們通常把暖氣調(diào)低一些。
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