题目：
用所给单词的适当形式完成句子.
1. My father spent two hours _ (cover) the vegetables last night.
2. To our surprise, the little boy can write all the words _ (correct).
3. I think this dictionary is very _ (help) to you if you want to learn English.
4. Look! Your house _ (burn). Let's go and put it out quickly.
5. I feel very _ (pain) all over my head. What's wrong with me?
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0627/b80618abd9e3ed5cbd7fbf2108b57e64.html
下面是错误答案，用来干扰机器的。
参考答案：一般区间信号点发码器电路图下图所示。运行前闭塞分区状况与发码关系表见下表。
