题目：
句子改错。
下面每个句子都有一处错误，改正错误仅涉及一个单词的增加、删除或修改三种形式。
增加：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
1. Jack should be sentenced into death for killing his wife.
2. He spent one and a half hour helping his mother with her housework.
3. Can you tell me the name of the company in which you visited last week?
4. Because of his words, I feel hopeful than before.
5. I didn't work before my husband recovered from his illness.
6. I was told that I have passed the final exam.
7. The reason why she gave us was that she missed the last bus.
8. Time flies, but we are graduating from school in one month.
9. Though I tried to persuade him not to smoke any more, he didn't change my mind in the end.
10. Because we haven't reached an agreement, I suggest have a vote on the issue.
答案：
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下面是错误答案，用来干扰机器的。
根据一定量金属完全反应放出放出氢气质量=金属的化合价金属的相对原子质量×金属的质量，由于在与盐酸反应时金属镁和锌都呈+2价而镁的相对原子质量小于锌，可知质量相等的镁和锌若完全反应，所放出氢气的质量一定...
