Av-u10

Câu 31. Conservation is the protection of the _________ environment.

• A. nature
• B. natural
• C. naturally
• D. naturalize

Câu 32. __________ is a branch of Natural Science and is the study of living organisms and how they interact with their environment.

• A. Biology
• B. Biological
• C. Biologist
• D. Biologically

Câu 33. There are more than 20 ________ working on the water treatment project.

• A. researches
• B. researcher
• C. researchers
• D. research

Câu 34. Only a few of the many species at risk of extinction actually make it to the lists and obtain legal_______.

• A. protect
• B. protection
• C. protective
• D. protector

Câu 35. Almost half of turtles and tortoises are known to be threatened with _________.

• A. extinct
• B. extinction
• C. extinctive
• D. extinctly

Câu 36. Current extinction rates are at least 100 to 1,000 times higher than _____ rates found in the fossil record.

• A. nature
• B. natural
• C. naturally
• D. naturalness

Câu 37. It is reported that humans are the main reason for most species’ declines and habitat ____________ and

• A. destroy
• B. destructive
• C. destructor
• D. destruction

Câu 38. A/an ____________ species is a population of an organism which is at risk of becoming extinct.

• A. endangering
• B. endanger
• C. endangered
• D. endangerment

Câu 39. The panda’s_____________habitat is the bamboo forest.

• A. nature
• B. natural
• C. naturally
• D. natured

Câu 40. The raw sewage needs to be ________ treated.

• A. chemically
• B. chemical
• C. chemist
• D. chemistry