benefits of forming complete sentences when communicating are __12__ of the effort.

　　Butterflies. Of course. I rushed to __13__ them from the garbage, __14__ them off and handed them to my young artist. "Want to see them __15__ again？" he asked with a shy smile. "Oh, yes! They're beautiful，" I whispered. He ran back upstairs to float his __16__ down again. They really did look like beautiful butterflies.

　　That day Paul __17__ me to look up at __18__ instead of down at garbage. How many other masterpieces do I miss because I'm too caught up in my __19__ to take time to appreciate what's right in front of me? Life is not what happens to us. It's __20__ we look at it. Now, I look up.

　　1．A.laughed　　　　　　　 　B．sighed

　　C．amazed D．shouted

　　解析：选B　根据下文的"No quiet sighing this time."可知，"我"叹了口气，把掉在地上的几张废纸捡起来。

　　2．A.Days B．Years

　　C．Moments D．Weeks

　　解析：选C　根据语境可知，一开始只是几张废纸，一会儿"我"发现了更多的废纸。故选C。

　　3．A.called out B．turned up

　　C．got in D．added to

　　解析：选A　这一次"我"不再静静地叹息，大声喊："是谁在扔垃圾？"故选A。call out"大声呼叫"。

　　4．A.up B．down

　　C．away D．off

　　解析：选B　根据"from upstairs"可知，纸是从楼上飘下来的。第四段中的"He ran back upstairs to float his __16__ down again."也是提示。故选B。

　　5．A.planes B．papers

　　C．leaves D．butterflies

　　解析：选D　根据第三段的"Where are my other butterflies？"可知，选D。

　　6．A.rarely B．frequently

C．willingly D．eagerly