2015年成人高考专升本《英语》深度预测卷(6)

三、完型填空
21、根据下面内容，回答21-35题：
Scientists in the UK have announced that the piranhafish's reputation 21 a fearsome 22 may well not be deserved. The fish, which is found in the Amazon in Brazil, have been 23 as deadly carnivores( 食肉动物 ) that work in shoals to overwhelm their prey and strip it of its flesh in seconds.
However, experts 24 St Andrews University say that piranhas are omnivores(杂食动物) that mainly eat fish, plants and insects. They form big groups not to hunt but to defend 25 against other predators, according to the team.
"Previously it was thought piranhas shoaled as it 26 them to form a cooperative hunting group," said Professor Anne Magurran. " 27, we have found that it is primarily a defensive behavior. "
Piranhas can be attacked by animals 28 dolphins, caimans and large fish, so forming a shoal is a good way of 29 being killed. Piranhas of 30 age stay in the middle of the group for 31 and the 32 of the shoal differs according to the level of 33 When the water level is 34, the fish form small groups as there is space to escape, but when the water level drops, they form large groups as protection 35 predators.

A．as
B．as if
C．as though
D．since


22、
A．kill
B．killer
C．murderer
D．murder


23、
A．told
B．saying
C．describing
D．portrayed


24、
A．out
B．with
C．from
D．by


25、
A．them
B．themselves
C．it
D．itself


26、
A．able
B．is able
C．enable
D．enabled


27、
A．Thus
B．However
C．Suddenly
D．Therefore


28、
A．such
B．example
C．like
D．as such


29、
A．prevent
B．preventing
C．avoid
D．avoiding


30、
A．reproduce
B．reproductive
C．reproduction
D．reproductively


31、
A．protection
B．protecting
C．protect
D．protective


32、
A．rate
B．size
C．amount
D．percentage


33、
A．fate
B．destiny
C．risk
D．chance


34、
A．high
B．low
C．peaceful
D．chaotic


35、
A．for
B．against
C．without
D．towards

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