Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 20 to 24. Fill in the appropriate word in question 20

Many animals in the wild are suspicious and fearful of human beings. Many animals would take escape instantly (20)_____________a human approaches. Man, however, soon discovered that some animals can be tamed or domesticate. Unlike animals in the wild, these animals would (21) _____________ man to come close to them. They would even allow their owners to stroke or pet them.

In the early times man would domesticate animals by setting traps to catch their young. A young  animal is (22) _____________  easily domesticated than an adult one. From young, the animal learns to trust and obey its owner.

Many different kinds of animals have been domesticate. Some common examples are animals like horses, elephants, chickens and pigs. The dog, which is also (23)_____________ as "man's best friend", is one of the first animals to have been domesticate. In England, long ago, the pig was a wild animal. It was a ferocious and aggressive (24)_____________ which was not easily capture. Yet nowadays, the domesticated pig is no longer the lean and tough than creature it used to be.

A. when

B. whether

C. where

D. while

Cho x mol hỗn hợp kim loại Zn, Fe (có tỉ lệ mol 1 : 1) tan hết trong dung dịch chứa y mol H₂SO₄ (tỉ lệ x : y = 2 : 5). Sau khi kim loại tan hết thu được sản phẩm khử Y duy nhất và dung dịch Z chỉ chứa muối sunfat. Cho m gam Cu tan hoàn toàn trong dung dịch Z. Giá trị m lớn nhất là 

A. 6,4y

B. 19,2y

C. 12,8y.

D. 12,8x

Choose the sentence which is closest in meaning to the one above or that has been completed from the given word cues.
Don’t let her treat you like that

A.  You are not let be treated like that by her

B. Don’t allow you to be treated like that

C. Don’t let yourself be treated like that by her

D. She doesn’t treat you like that

Thực vật quý hiếm là thực vật có giá trị kinh tế (lấy gỗ. làm thuốc ; cây công nghiệp...) nhưng đang bị khai thác quá mức và ngày càng hiếm đi.

Bảo vệ môi trường , nhà ở ,... cần:
1 Trồng cây
2 Để sọt rác ở nh` nơi
3 Gom giấy vun
4 Phân loại rác thải
5 Tìm hiểu
6 Tuyên truyền
7 Dọn dẹp nhà cửa và quanh nhà mình trước nhất, sau vận động mọi ng`
mik nghĩ vậy thôi, ko pik có đúng ko nha!