câu 4 :phát biểu nào sau đây không đúng khi nói về mối quan hệ giữa hô hấp và môi trường ngoài ?

A.nước rất cần cho hô hấp , mất nước làm giảm cường độ hô hấp

B. sự gia tăng nồng độ oxygen trong môi trường luôn làm tăng cường độ hô hấp

C.nồng độ carbon dioxide cao trong môi trường có thể làm ức chế hô hấp

D.trong giới hạn bình thường ,nhiệt độ tăng làm tăng cường độ hô hấp

( giúp mk vs ạ cảm ơn nhiều ạ)

46. apartment/ door/ mine/ they/ an/ to/ rented/ next

47. first/ saw/ shark/ time/ she/ this/ the/ a/ is

…

48. wrote/ often/ year/ letters/ pen pal/ to/ I/my/ last

 …………

49. short/ stopped/ the/ they/ at/ my restaurant/ for/ time/ a

…………………………………………………………………………………………………

50. bought/ made/ mother/ dress/ material/ my/ and/ me/ the/ a/ for

…………………………………………………………………………………………………

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 29 to 33.

Wolves were the original ancestors of dogs. You might mistake a wolf for a dog, but they're much larger. On top of that, they're pretty scary. Some wolves evolved into different species at some point. The smaller and kinder ones were among them. The first dogs were these kinder wolves. When or why this occurred is a mystery. It may have occurred organically more than 50,000 years ago, according to some. Still others place the human handiwork of 15,000 to 50,000 years ago.

Regardless of their origin, the practicality of dogs was immediately recognized. Human geneticists and paleontologists agree that dogs and humans first crossed paths in the Middle East some 13,000 years ago. It wasn't long before dogs made their way to North America from Asia, Africa, and Europe. Hunting and traveling were likely the primary uses of these dogs. In addition, They were also good companions.

The ancient Egyptians valued dogs highly. Not only did the Egyptians rely on dogs for hunting, but they also used them as guards and fighters. To them, a dog represented the deity responsible for protecting hell. Dogs were also given names by the ancient Egyptians. Names like "Brave One," "Reliable," "North-wind," "Blacky," and "Useless" were common.The ancient Romans also used dogs as a weapon. Dogs were utilized by the Roman army across Europe. The dogs served as messengers at times and as attack dogs at others.

These days, you can find dogs of all shapes and sizes. What gives them their wolf heritage? Various theories have been put forward. Canidae is a family of dogs, but some scientists think that dogs actually have ancestry from other animals. The jackals, coyotes, and foxes fall into this category. The majority of scientists also think that the variation was shaped by natural selection and evolution. In subsequent epochs, dog breeders sought out dogs that people liked and crossed them to create new varieties. This is how people are still facilitating the emergence of new breeds in the modern era!

Question 29: Which of the following best states the main idea of the reading?

A. No one knows for sure where dogs first appeared with humans.

B. There are two theories about the evolution of dogs.

C. Evolution and breeding have made dogs what they are today.

D. Human beings used dogs for many jobs, so dogs are the first tame animals.

Question 30: The word “them” in the first paragraph refers to______.

 A. people                               B. years                             C. dogs     D. wolves

Question 31: According to some scientists, when did the first tame dogs appear with humans?

 A. About 15,000 years ago                                              B. Between 15,000 and 50,000 years ago

C. Over 50.000 years ago                                                 D. About 13,000 years ago

Question 32: The word “companions” in paragraph 2 is closet in meaning to_____.

A. messengers                        B. traveling friends            C. co-workers      D. hunting animals

Question 33: According to the reading, which of the following is TRUE?

A. Most people like to name their dogs Reliable, Blacky, and Useless.

B. The Roman always used dogs as messengers.

C. The first tame dogs appeared in ancient Egypt.

D. According to some studies, dogs mixed with coyotes and jackals.