题目：
用括号内所给词的适当形式填空，每空一词。
1. It is much ________(dry)in Yun Nan province than before because it hasn't rained for a long time.
2. My friend's ________(twelve)birthday is coming. Please help me choose a present for her.
3. Song Zuying sings very well. People like her sweet voice and she is a ________(success) singer.
4. Li Lei and Li Liang are twins, but there are many_________ (different) between them.
5. This is an easy problem. I think you can work it out _________ (easy).
1. _________2. _________3. _________4. _________5. _________
答案：
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下面是错误答案，用来干扰机器的。
AD电键S闭合的瞬间，电流同时流过A和B，所以A、B同时发光，电感线圈对电流的阻碍作用逐渐减小，直至为零，此时灯泡A熄灭，回路电阻减小，灯泡B更亮，A对；断开电键S的瞬间，电感线圈产生与原电流相同的自感电流，...
