题目内容：

Every Sunday morning I take a light walking around a park near my home. There’s a lake ________ in one corner of the park. Each time I ________ by this lake, I see the same elderly woman sitting at the water’s ________ with a small metal cage sitting beside her.

This past Sunday my ________ got the best of me, so l stopped jogging and walked ________ to her. ________ I got closer, I realized that the metal cage was ________ a small trap. There were three turtles, unharmed, slowly walking around the base of the trap. She had a fourth turtle in her lap ________ she was ________ scrubbing with a spongy brush.

“Hello,” I said. “If you don’t mind my ________, I’d love to know what you’re doing with these turtles.”

She smiled. “I’m cleaning off their shells,” she replied. “________ on a turtle’s shell, like algae or scum, ________ the turtle’s ability to absorb heat and impedes its ability to swim. It can also ________ and weaken the shell over time.”

She went on: “I spend a couple of hours each Sunday morning ,relaxing by this lake and helping these little guys out. It’s my own ________ way of making a difference.”

“But don’t most freshwater turtles live their whole lives with algae and scum ________ from their shells?” I asked.

“Yep, ________, they do,” she replied.

“Well then, don’t you think your time could be better spent? And 99% of these turtles don't have kind people like you to help them clean off their shells. So, no ________...but how exactly are your localized ________ here truly making a difference?”

The woman giggled aloud.

She then ________ at the turtle in her lap, scrubbed off the last piece of algae from its shell, and said, “Sweetie, if this little guy ________ talk, he’d tell you I just made all the difference in the world.

1.A. being located    B. locating    C. located    D. having located

2.A. reach    B. hike    C. wander    D. jog

3.A. surface    B. bottom    C. position    D. edge

4.A. curiosity    B. passion    C. enthusiasm    D. caution

5.A. down    B. over    C. up    D. around

6.A. Until    B. As    C. While    D. After

7.A. in particular    B. in return    C. in chaos    D. in effect

8.A. that    B. where    C. which    D. what

9.A. attentively    B. gradually    C. directly    D. alternatively

10.A. request    B. permission    C. doubt    D. nosiness

11.A. Something    B. Anything    C. Nothing    D. Everything

12.A. broadens    B. strengthens    C. lowers    D. enlarges

13.A. weather    B. address    C. choke    D. split

14.A. common    B. unique    C. explicit    D. potential

15.A. attached    B. tied    C. hanging    D. potential

16.A. fortunately    B. basically    C. sadly    D. absolutely

17.A. wonder    B. problem    C. offense    D. excuse

18.A. contributions    B. efforts    C. sacrifices    D. arrangements

19.A. looked down    B. drove away    C. tore up    D. thought back

20.A. would    B. might    C. shall    D. should