题目内容：

Last night, my husband and I were taking a post-dinner walk in a nearby parking lot, when we saw a man breaking something with a rock. He was completely ________ his task and didn’t look up at anyone passing by. We kept ________ him as we walked around the parking lot and talked between ourselves about what he might be doing. I ________ he was breaking stones to make sand, but why would he do that?

_____, we decided to go up and speak to him. He was ________ pieces of leftover bread that he had collected from his housemates to make ________ for the birds that come there every morning. The large pieces of bread would be ________ for the birds to eat, so he ground（研磨）them into a fine powder（粉末）with the ________.

It was moving to hear that he’s been doing this every ________,by himself, for the last three or four years. What ________ us more was that he was surprised we were even taking ________ in this, since for him it wasn’t a big deal. Every night, he ________ leftover bread from his housemates. He then spends the next one or two hours in the parking lot crushing（压碎）each piece of ________ and making a neat pile（堆）for the birds, which he says will be ________ by the next evening. He also ________ fresh water and adds birdseed（鸟食）on top of the pile.

When we asked him why he does this small and simple act of ________, he shrugged and said, “It’s just something ________ I do so that the leftover bread doesn’t go into the ________ and the birds get food.”

We shared his story with the hope that it might remind us to be more ________ with our leftover food. Perhaps it might ________ someone to do something similar in their own area.

1.A. worried about    B. focused on    C. tired from    D. satisfied with

2.A. questioning    B. showing    C. helping    D. noticing

3.A. thought    B. discussed    C. wondered    D. admitted

4.A. Naturally    B. Patiently    C. Surely    D. Finally

5.A. picking up    B. breaking up    C. spreading    D. piling

6.A. food    B. drink    C. nests    D. desserts

7.A. perfect    B. healthy    C. difficult    D. enough

8.A. necessary    B. difficult    C. natural    D. possible

9.A. morning    B. afternoon    C. night    D. weekend

10.A. embarrassed    B. pleased    C. confused    D. moved

11.A. a role    B. an interest    C. part    D. pride

12.A. collects    B. buys    C. borrows    D. steals

13.A. cake    B. bread    C. chocolate    D. birdseed

14.A. removed    B. lost    C. gone    D. discovered

15.A. leaves    B. takes    C. drops    D. saves

16.A. faith    B. choice    C. courage    D. service

17.A. special    B. interesting    C. small    D. useful

18.A. plate    B. trash    C. market    D. ground

19.A. fun    B. content    C. patient    D. careful

20.A. inspire    B. guide    C. allow    D. require