题目内容：

阅读下面短文，从短文后各题所给的四个选项（A, B, C, D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

Last year we went to visit some friends in the North of Germany. The day we arrived, the      was very nice, so we decided to go to the local outdoor swimming pool. When we got there, my wife and three of our children and I were     a good spot (地点) near the pool to rest later. Our eldest son Cian, back then 7 years old, couldn't wait to jump into the pool. But he could     swim at the time and still insisted on trying.     the deep part of the pool was clearly marked by a big rope, we      to let him off.

Just a minute later, our son came to us clearly     and shook up. We were      as he was no more than 5 meters away in the pool and we just left him there for a minute. Our friend Stefan who was a bit behind us told us what     when he got to the pool.

Cian, glad with himself being first in the water before his elder sister, made his way to the rope that      the deep pool from the shallow end. What he didn't     was that the slope (斜坡) was very severe and the rope was loose. Therefore, he pushed slightly into the      end. Cian felt himself falling into the water and felt      .

Thankfully our friend Stefan     all of this. His daughter      some swimming lessons where the parents were told how to     whether a person is drowning. Stefan saw our son helplessly     on the surface. He quickly jumped in and pulled him to      . We were absolutely shocked as we were only 5 metres away but      unaware of what was going on.

We were very lucky and learned our      , which is never to leave a child unattended at the pool or on the beach. Please don't make the same     ,otherwise the result will be unimaginable.

1.A. scenery       B. weather       C. water         D. city

2.A. looking for    B. referring to    C. setting up     D. watching over

3.A. almost        B. often         C. hardly        D. fairly

4.A. Once         B. So           C. Since         D. Unless

5.A. argued       B. demanded      C. refused       D. agreed

6.A. calm         B. upset          C. excited       D. moved

7.A. disappointed   B. puzzled       C. interested      D. worried

8.A. happened     B. appeared       C. spread        D. changed

9.A. organized     B. covered       C. divided        D. moved

10.A. doubt        B. explain        C. understand     D. realise

11.A. clean        B. plain          C. deep          D. new

12.A. angry       B. helpless        C. surprised       D. tired

13.A. experienced  B. expected       C. recorded       D. saw

14.A. attended     B. held          C. taught         D. prepared

15.A. believe      B. show          C. judge         D. prove

16.A. floating     B. swimming      C. running        D. walking

17.A. attention    B. happiness       C. protection      D. safety

18.A. completely  B. necessarily      C. slightly        D. slowly

19.A. tip         B. wisdom      C. knowledge     D. lesson

20.A. pain       B. mistake       C. schedule      D. plan