题目内容：

下列每个句子中有一处语言错误。每处错误涉及一个单词的增加、删除或修改。

增加: 在缺词处加一个漏字符号（∧）, 并在其下写出该加的词。

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。

注意: 每处错误及其修改均仅限一词。

1.A good movie does not necessarily have a happy ending, but the readers must not be left unsatisfying.

2.These days, the heavy fog has added up our difficulties with the work.

3.If you want to buy such a good equipment, it will take a lot of money.

4.As the approach of Thanksgiving Day, our classmates decide to hold a party to celebrate the important occasion.

5.Our headmaster is a middle-aged man in the late forties and of average height.

6.Basing on these facts, you can reach the following conclusion.

7.He is driving on a speed of 60 miles per hour in the highway.

8.The beggar has no alternative but sleep in the park.

9.This is the first time that I had driven a car by myself, which is really an exciting experience.

10.I apologize for not be able to join you for dinner.