[单项选择]The grass_____ many animals live is abundant here.
A. by which
B. with which
C. on which
D. of which

[单项选择]The grass ______ many animals live is abundant here.
A. by which
B. with which
C. on which
D. of which

[单项选择]Being able to move gives animals many advantages, but it also generates its own demands. For any animal, ______ movement can be unhelpful or even dangerous.
A. ransom
B. retrieve
C. random
D. redeem

[单项选择]Pet animals live in millions of American homes. People keep cats, dogs, birds, fish, guinea pigs, mice -- ______ snakes.
A. and
B. together with
C. even
D. but not

[单项选择]Ever ______ they came to live here, they have hated everything about the place.
A. when
B. since
C. though
D. if

[单项选择]Small animals are said to live faster because they______.
A. have more skin for their weight
B. bum fuel faster than big ones
C. replace lost heat faster
D. keep a high body temperature

[单项选择]Small animals are said to live faster than big ones because they ______.
A. have more skin for their weigh
B. replace lost heat faster
C. burn fuel faster than big ones
D. keep a higher body temperature

[单项选择]Why do many scientists think animals are basically sleepwalkers
A. Because animals learn to carry out complex actions.
B. Because animals are trained to carry out complex actions.
C. Because animals carry out complex actions in response to stimuli.
D. Because animals carry out complex actions without awareness.

[单项选择]How many animals have been found neglected by inspectors in the last 12 months


A. Over 1,000,000.
B. More than 70,000.
C. Nearly 20,000.
D. Close to 3000.

[单项选择]The physical shape and coloring of many animals are the result of gradual （） to particular circumstances.
A. modification
B. variation
C. application
D. adaptation

[单项选择]

Passage Five Many animals are used to help scientists find cures for diseases. One of the most common animals used is monkeys, or primates. There are groups of people who want to stop the research on animals. They are called animal rights activists. The scientists say their research could help save the lives of many men, women and children. They try to cure diseases like cancer and AIDS. The animal rights activists say the animals suffer. They take baby monkeys away from their mothers, and sometimes holes are drilled in their heads. The activists have tried to stop the research for the past 10 years. They let animals go free or damage the labs. The University of California at Davis has 3,800 rhesus macaque monkeys. It is one of the largest primate research labs. The activists sent letters to researchers at Davis and about eighty other researchers around the country, whose names were on the web pages. The warning letters had razor blades hidden so that a person could slice
A. In the newspaper.
B. On the radio.
C. On a web page.
D. On the television.

[单项选择]Granted that many animals seem to be highly sensitive to various signals ______ earthquakes, the basic question remains of how this behavior can be put to use in earthquake prediction.
A. associated with
B. connected with
C. as regards
D. in case of

[单项选择]Many sharks fish and other sea animals.
A. live with
B. depend in
C. feed on
D. eat at