阅读下面的短文，在标有序号的空白处填入一个适当的词或用括号中词的适当形式填空。

The skin is  1.    essential part of your body and its largest organ. You have three

 l 2.   of skin which act as a barrier　3.　disease , poisons and the sun’s harmful rays. The functions of your skin are also very 4.　: it keeps you warm or cool; it5.　your body from losing too much water; it is __6.__ you feel cold , heat or pain and it gives you your 7.　of touch. So as you can imagine, if your skin gets _8.__  it can be very serious. First aid is a very important 9.　step in the treatment of burns . You can get burned by a variety of things. There are three types of burns, 10. (depend) on which layers of the skin are burned.

For most of the day construction worker Sidney Smith and his brother – in – law Joseph Chambers had been   21  along the banks of Lake Waco with little   22 . Chambers suggested they go home, but Smith　33　　that there were still several hours of daylight　24　　and there was one other place they might try a bit longer before 　25　.
Smith drove his pickup（小货车）a couple of miles along the　26　road to get to the other side of the lake. This road, in the truest sense, was a path wagging in the heavy　27　area. Even with the sun still high in the cloudless sky, the　28　of trees formed a leafy　29　over the road and it suddenly seemed 　30　in the evening.
“A guy could get lost and nobody would ever find him,” said Chambers.
Smith smiled, “We’re　31　there.” He said. A few seconds later, the smile was 　32　　from his face.
“What the hell is that?”
　　He braked to a stop. Less than twenty feet away was what appeared to be a  33 .
　　For several minutes the two men sat in the pickup　34　to decide whether they had happened to　35　someone’s bad practical joke or something far more serious. Smith with his brother-in-law got out of the pickup and 　36　walked towards that thing some distance before them.
It was a young man who was already dead. They had got to tell　37　. Back into the pickup, Smith backed the pickup down the road　38　he could turn around, then　39　back. With the dead young man still on his mind, Smith felt as if he was going to be sick. God, how he　40　　they had given up fishing and gone home early.

For most of the day construction worker Sidney Smith and his brother – in – law Joseph Chambers had been   21   along the banks of Lake Waco with little   22  . Chambers suggested they go home, but Smith 　33　　that there were still several hours of daylight 　24　　and there was one other place they might try a bit longer before 　25　.

Smith drove his pickup（小货车）a couple of miles along the　26　road to get to the other side of the lake. This road, in the truest sense, was a path wagging in the heavy 　27　area. Even with the sun still high in the cloudless sky, the 　28　of trees formed a leafy　29　over the road and it suddenly seemed 　30　in the evening.

“A guy could get lost and nobody would ever find him,” said Chambers.

Smith smiled, “We’re 　31　there.” He said. A few seconds later, the smile was 　32　　from his face.

“What the hell is that?”

　　He braked to a stop. Less than twenty feet away was what appeared to be a  33  .

　　For several minutes the two men sat in the pickup 　34　to decide whether they had happened to 　35　someone’s bad practical joke or something far more serious. Smith with his brother-in-law got out of the pickup and 　36　walked towards that thing some distance before them.

It was a young man who was already dead. They had got to tell 　37　. Back into the pickup, Smith backed the pickup down the road 　38　he could turn around, then 　39　back. With the dead young man still on his mind, Smith felt as if he was going to be sick. God, how he　40　　they had given up fishing and gone home early.

A．playing　   B．boating　　     C．fishing　　　　      D．walking

A．failure　       B．success　  C．disappointment D．interest

A．quarreled　 B．argued　      C．reasoned　      D．shouted

A．remaining　 B．staying　　     C．keeping　　    D．leaving

A．starting off　B．running out　   C．sending away　       D．giving up

A．winding 　 B．widening　       C．leading　　　  D．blocking

A．grassed 　　B．wooded　　　 C．iced　　　　   D．snowed

A．trunks　　　B．shadow　　     C．shade　　　　 D．shape

A．hat　　　　B．umbrella　 C．sheet　　　     D．overcoat

A．foggy　　 B．late　 　  C．early　　 D．rainy

A．almost 　　B．already　　     C．only　　　      D．fairly

A．escaped　　B．lost　 　　　C．gone　　　       D．missed

A．body　　　B．trap　 　　　 C．pile　　　　   D．stream

A．talking 　　B．hoping 　　 C．wanting　　    D．trying

A．come across B．turn out　　  C．bring about　   D．make up

A．loudly　　　B．quietly　　  C．quickly　　　  D．slowly

A．everybody　 B．somebody　　C．anybody　　　 D．nobody

A．until　　　 B．before　　　  C．after　　　    D．when

A．turned 　　 B．ran　　　　　C．headed　　　 D．walked

A．expected　　B．hoped 　　 　C．wished　　　  D．prayed

For most of the day construction worker Sidney Smith and his brother – in – law Joseph Chambers had been   21  along the banks of Lake Waco with little   22 . Chambers suggested they go home, but Smith　33　　that there were still several hours of daylight　24　　and there was one other place they might try a bit longer before 　25　.

Smith drove his pickup（小货车）a couple of miles along the　26　road to get to the other side of the lake. This road, in the truest sense, was a path wagging in the heavy　27　area. Even with the sun still high in the cloudless sky, the　28　of trees formed a leafy　29　over the road and it suddenly seemed 　30　in the evening.

“A guy could get lost and nobody would ever find him,” said Chambers.

Smith smiled, “We’re　31　there.” He said. A few seconds later, the smile was 　32　　from his face.

“What the hell is that?”

　　He braked to a stop. Less than twenty feet away was what appeared to be a  33 .

　　For several minutes the two men sat in the pickup　34　to decide whether they had happened to　35　someone’s bad practical joke or something far more serious. Smith with his brother-in-law got out of the pickup and 　36　walked towards that thing some distance before them.

It was a young man who was already dead. They had got to tell　37　. Back into the pickup, Smith backed the pickup down the road　38　he could turn around, then　39　back. With the dead young man still on his mind, Smith felt as if he was going to be sick. God, how he　40　　they had given up fishing and gone home early.