23. After several days of heavy rain the roof __________ with a loud noise, crashing (坠落) onto the ground.(本题4.0分) A、 came out B、 came down C、 came on D、 came at
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26. As long as the sun shines, the earth will not
26. As long as the sun shines, the earth will not ____ energy(本题2.0分) A、 short o