Some years ago，on a hot summer day in south Florida，a little boy decided to go for a swim in the river in front of his house．

In a（36） 　 　to dive into the cool river，he ran out through the back door，leaving（37） 　 　his shoes and shirt as he went．He dived into the water，not（38） 　 　that as he swam toward the middle of the river，an alligator（鳄鱼） was swimming（39） 　 　him．Inside the house，his mother was looking out by the window．She saw the two as they got closer and closer．In great fear，she rushed out of the house and（40） 　 　toward the water，（41） 　 　to her son as loudly as she could．

Hearing her voice，the little boy became alarmed and made a（42） 　 　to swim to his mother．It was too （43） 　 　．Just as the mother reached her son，so did the ailigator．

From the bank，the mother caught the boy by the（44） 　 　while the alligator snatched his leg．Then began an unbelievable tug﹣of﹣war （拔河比赛） between the two．The alligator was much（45） 　 　than the mother，but the mother wouldn't give up．

A farmer（46） 　 　to drive by．He heard the cry，raced from his truck，took aim and shot the alligator．

After weeks and weeks in hospital，the tittle boy was in good（47） 　 　again．But on his legs there were scars（伤疤）（48） 　 　by the animal and，on his arms，there were also scars left by his mother in her effort to hold on to the son she loved．

A newspaper reporter asked the boy（49） 　 　he would show his scars．The boy lifted his legs．And then，with clear（50） 　 　，he said to the reporter，"But look at my arms，I have great scars on my arms，too．I have them because my mother wouldn't let go．"

36．A．hurry	B．dream	C．hungry	D．time
37．A．for	B．over	C．behind	D．out
38．A．hearing	B．understanding	C．feeling	D．realizing
39，A．backward	B．downward	C．toward	D．upward
40．A．ran	B．walked	C．jumped	D．moved
41．A．smiling	B．shouting	C．talking	D．nodding
42．A．change	B．mistake	C．face	D．turn
43．A．dangerous	B．close	C．late	D．early
44．A．legs	B．arms	C．hands	D．feet
45．A．faster	B．taller	C．bigger	D．stronger
46．A．happened	B．came	C．noticed	D．stopped
47．A．shape	B．health	C．look	D．build
48．A．followed	B．written	C．left	D．broken
49．A．where	B，how	C．when	D．whether
50．A．sadness	B．pride	C．purpose	D．service