Chọn đáp án đúng để hoàn thành câu: 

He had to leave early, ______ he?

Without(A) the particularly(B) habitat, the species could(C) not survive(D).

Such(A) human activities as pollution, drainage(B) of wetlands, cutting and clearing(C) of forests, urbanization, and road and dam construction has destroyed(D) or seriously damaged available habitats.

Habitat fragmentation (A) have caused (B) plant and animal species (C) in the remaining islands of habitat to losecontact with (D) others of their own kind.

Although(A) species evolve differently, most of them adapt(B) to a specific habitat or environment that(C) best meets their survive(D) needs.

hoàn thành câu: 

Although we are aware _______ the importance of environment, we still exploitit.   

Chọn đáp án đồng nghĩa nhất với câu sau: 

It's not necessary for you to do the test. 

Chọn đáp án đúng để hoàn thành câu: 

You _______ be rich to be a success. Some of the most successful people I knowhaven't got a penny to their name.