Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Humans depend on species diversity to provide food, clean air and water, and fertile soil for agriculture.
A.raise
B.produce
C.supply
D.reserve

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Although we are aware _______ the importance of environment, we still overexploit it.
A.from
B.on
C.for
D.of

The train will leave in five minutes so you _________ better hurry up.
A.had
B.should
C.will
D.would

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
They have built a particular reserve' which is suitable _______ pandas.
A.at
B.upon
C.in
D.for

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Contamination and global warming have driven many species of animals and plants _______ the threat of extinction.
A.for
B.to
C.with
D.on

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
_______ is the protection of environment and natural resources.
A.Survival
B.Commerce
C.Conservation
D.bridge

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Over-exploitation for food, pets, and medicine, pollution, and disease are recognized _______ a serious threat _______ extinction.
A.as/ of
B.to/ for
C.over/ with
D.upon/ at

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Hunting for meat and burning forests for soil cause destruction to wildlife.
A.organization
B.contamination
C.protection
D.damage

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Life on Earth is disappearing fast and will continue to do so unless urgent action is taken.
A.vanishing
B.damaging
C.polluting
D.destroying

Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
Humans depend on species diversity to provide food, clean air and water, and fertile soil for agriculture.
A.destruction
B.contamination
C.fertilizer
D.variety