第二节：完型填空（共20小题；每小题1分，满分20分）
阅读下面短文，掌握其大意，然后从36-55各题所给的四个选项（A、B、C、D）中，选出最佳选项。
The earliest men did not have much time for art; they faced many dangers, and hunting for food took  36  almost all their time . But after many thousands of years,  37 perhaps a million years or more, they became very good hunters, and   38  gave them a little free time which they could use for other things. A few of them began to paint on the walls of the caves    39  they lived. Many early artists painted animals  40  they were the most important things in their lives. Animals supplied   41  to keep them living, and skins to keep them    42 .
Like painters today, the  43  artists possibly painted for many   44 , Perhaps they wanted to give their cave a little brightness and color; perhaps they had a few special ideas which they could express most easily in a   45  and perhaps they   46  wanted to spend a little time in a pleasant way. Many of them  47  magic（巫术），and they often drew animals which they caught. They  48  that by drawing these things, they would make them really   49 .
In many parts of the world , people have   50  cave paintings. The earliest paintings  51  we know about are in Europe. Because of the  52  weather, the earliest men in Europe used the caves for  53 ; in many warmer parts of the world, this was not necessary. We know a lot about the  54  of the Eurpopean paintings, and we believe that the earliest  55  were painted about thirty thousand years ago.
36．A．away         B．back            C．out        D．up
37．A．even         B．though             C．and       D．or
38．A．which          B．this              C．what      D．who
39．A．which          B．that              C．where       D．when
40．A．although      B．because            C．if          D．as if
41．A．air           B．fur               C．food      D．water
42．A．comfortable     B．warm                  C．beautiful   D．healthy
43．A．super         B．early             C．clever       D．talented
44．A．people         B．places              C．animals     D．reasons
45．A．painting       B．word             C．smile      D．wall
46．A．often         B．quite             C．just       D．even
47．A．believed in       B．took advantage of  C．tried out   D．begged for
48．A．knew         B．hoped              C．understood D．realized
49．A．disappear     B．appear             C．miss      D．find
50．A．searched      B．looked for         C．discovered       D．known
51．A．which          B．that              C．when      D．as
52．A．sunny          B．warm                  C．cool      D．cold
53．A．home              B．house              C．shelter      D．building
54．A．names         B．dates             C．places       D．shows
55．A．that          B．one              C．it          D．ones