考研英语（一）完形填空专练精讲
Section I Use of English
Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)
The idea that plants have some degree of consciousness first took root in the early 2000s; the term “plant neurobiology” was 1 around the notion that some aspects of plant behavior could be 2 to intelligence in animals. 3 plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses that 4 consciousness, researchers previously reported.
But such an idea is untrue, according to a new opinion article. Plant biology is complex and fascinating, but it 5 so greatly from that of animals that so-called 6 of plants’ intelligence is inconclusive, the authors wrote.
Beginning in 2006, some scientists have 7 that plants possess neuron-like cells that interact with hormones and neurotransmitters, 8 “a plant nervous system, 9 to that in animals,” said lead study author Lincoln Taiz, “They 10 claimed that plants have ‘brain-like command centers’ at their root tips.”
This 11 makes sense if you simplify the workings of a complex brain, 12 it to an array of electrical pulses; cells in plants also communicate through electrical signals. 13 , the signaling in a plant is only 14 similar to the firing in a complex animal brain, which is more than “a mass of cells that communicate by electricity,” Taiz said.
“For consciousness to evolve, a brain with a threshold 15 of complexity and capacity is required,” he 16 . “Since plants don’t have nervous systems, the 17 that they have consciousness are effectively zero.”
And what’s so great about consciousness, anyway? Plants can’t run away from 18 , so investing energy in a body system which 19 a threat and can feel pain would be a very 20 evolutionary strategy, according to the article.
1.[A]coined [B]discovered [C]collected [D]issued
2.[A]attributed [B]directed [C]compared [D]confined
3.[A]unless [B]when [C]once [D]though
4.[A]cope with [B]consisted of [C]hinted at [D]extended in
5.[A]suffers [B]benefits [C]develops [D]differs
6.[A]acceptance [B]evidence [C]cultivation [D]creation
7.[A]doubted [B]denied [C]argued [D]requested
8.[A]adapting [B]forming [C]repairing [D]testing
9.[A]analogous [B]essential [C]suitable [D]sensitive
10.[A]just [B]ever [C] still [D]even
11.[A]restriction [B]experiment [C]perspective [D]demand
12.[A]attaching [B]reducing [C]returning [D]exposing
13.[A]However [B]Moreover [C]Therefore [D]Otherwise
14.[A]temporarily [B]literally [C]superficially [D]imaginarily
15.[A]list [B]level [C]label [D]local
16.[A]recalled [B]agreed [C]questioned [D]added
17.[A]chances [B]risks [C]excuses [D]assumptions
18.[A] danger [B]failure [C]warning [D]control
19.[A]represents [B]includes [C]reveals [D]recognizes
20.[A]humble [B]poor [C]practical [D]easy
