题目内容：

写出下面句子括号中所给词的正确形式。

1.She entered the lab without ____(许可).

2.He ____(道歉) to her for being late.

3.The ability to keep calm is one of her many ____ (长处).

4.She told me she planned to ____(节食) and take more exercise.

5.For the____(利益) of these people who arrived late，I’ll just go over the plan again.

6.The reason he gave to ____ (解释) for his absence was unreasonable.

7.I was very sad ____(确实) to hear about the serious accident.

8.Because of the____ (猛烈的) natural disaster, a lot of people have lost their lives.

9.Smoking is____(有害的) to health, but there are still many people picking it up.

10.In the old times people had a____(理论) that the world was flat.