完形填空 one day i was doing a big

我帮你查了查,应该是高中联考的完形填空.答案如下：
36 B came across
37 C recalled
38 D climate
39 A headed
40 B unload
41 A warning
42 swallowed
43 B expensive
44 B cautiously
45 A locals
46 C sick
47 A get
48 C thought about
49 B into
50 D shock
51 A meant
52 B poverty
53 D unexpected
54 C dignity
55 A changed

把题写清楚好不好，我没看懂

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。
One day I was doing a big clean-up when I 36 a knotted handkerchief with an old dark brown coin inside. I took one look and immediately 37 a forg...