白山市通化矿务局医院:英语完形填空

Prehistoric people are human beings who lived before writing was invented about 5,500 years ago. Writing 26 people to record information they wished to save,27 descriptions of events in their lives.28 this way, the invention of writing marked the beginning of history. The period before human beings learned to write is called prehistory.
Scientists first discovered evidence of prehistoric people in the mid-1800’s .Most of this evidence 29 ancient, sharp-edged stone tools and fossilized （已变成化石的）bones of prehistoric people.
30 scientists collected more fossils of prehistoric people, they began to form a clearer 31 of what these early people looked like. For example, scientists learned that early human beings had smaller brains than most modern men and women have. This evidence indicated 32 humans had evolved-that is, modified their physical structure over time. Scientists developed a set of ideas about human origins 33 the theory of human evolution. This theory states that as the 34 of the prehistoric world changed, our prehistoric ancestors went 35 a series of changes that resulted in the first human beings. They, 36 , evolved into modern human beings.
Evidence of prehistoric people is 37 and difficult to find. Scientists must 38 their theory on this extremely limited evidence. As a result, scientists cannot 39 present a detailed picture of early human life. 40, new discoveries sometimes disprove theories that scientists already hold.

26．A．permitted B．admitted C．enabled D．let
27．A．included B．include C．to include D．including
28．A．In B．By C．With D．For
29．A．made up of B．consisted of
C．made up with D．consisted in
30．A．Since B．Now that C．As D．Even though
31．A．structure B．picture C．impression D．shape
32．A．where B．why C．when D．how
33．A．called B．calling C．meant D．meaning
34．A．atmosphere B．circumstance C．situation D．environment
35．A．over B．across C．through D．after
36．A．after all B．for sure C．without exception D．in turn
37．A．rare B．clear C．helpful D．changeable
38．A．consider B．base C．solve D．explain
39．A．still B．however C．yet D．anyway
40．A．In addition B．On the contrary
C．In practice D．On the whole