Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I don’t have chance to see a lot of ______animals because I live in a big city.
A.wildlife
B.species
C.mammals
D.insects

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Many nations have laws offering protection to these species, such as forbidding hunting, restricting land development or creating _______.
 
A.agencies
B.challenges
C.awareness
D.reserves

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The river around my village used to have the greastest__________ of freshwater fish in the country, but now very few species are found here.
A.diversified
B.various
C.diversity
D.variousness

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Living in warm waters, sea turtles_______hundreds of miles between their feeding grounds and the beaches where they nest and lay eggs.
A.migrate
B.swimming
C.migrating
D.swim

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
____________ is the existence of a wide variety of plant and animal species living in their natural environment.
A.Biodiversity
B.Conservation
C.Individual
D.Globe

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Small children and old adults are particularly________ to respiratory diseases in the cold weather.
A.vulnerable
B.invulnerable
C.infectious
D.infected

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
_______ is a branch of Natural Science, and is the study of living organisms and how they interact with their environment.
 
A.Biological
B.Biologically
C.Biology
D.Biologist

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Only a few of the many species at risk of extinction actually make it to the lists and obtain legal _______.
 
A.protector
B.protect
C.protection
D.protective

Liên kết cộng hóa trị trong phân tử HCl có đặc điểm
A.Có một cặp electron chung, là liên kết đơn, không phân cực.
B.Có một cặp electron chung, là liên kết ba, có phân cực.
C.Có hai cặp electron chung, là liên kết đôi, không phân cực.
D.Có một cặp electron chung, là liên kết đơn, phân cực.

Biết độ âm điện của $ F > Cl > Br > I $ , mức độ phân cực của liên kết hoá học trong các phân tử được sắp xếp theo thứ tự giảm dần từ trái sang phải là:
A.HI, HCl , HBr.
B.HI, HBr, HCl.
C.HBr, HI, HCl.
D.HCl , HBr, HI.