1. Many people around the world have lost their lives and homes because of natural disasters.

2. The survival of the natural world depends on each and every one of us.

3. Jack, whose house was destroyed in the fire is now homeless.

4. It was said that over 50 people had been homeless after the flood.

5. English is the language which is spoken as a first language by most people in the world.

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1. B-> so

2. C-> was watching

3. C-> knew

4. B-> in

5. C-> hearing

6. C-> not to talk

7. B-> asked

8. B-> more tired

9. C-> have ( ever) visited

10. A-> were

I

1 Mnay people around the world have lost their lives and homes because of natural disasters.

2 The survival of the natural world depends on each and every one of us.

3 Jack whose house was destroyed in the fire is now homeless.

4 It was said that over 50 people had been homeless after the flood. 

5 English is the language which is spoken as a first language by most people in the world.

II

1 B but -> so ( Cô ấy làm việc chăm chỉ vì vậy cố ấy vượt qua kì thi ).

2 C watched -> was watching ( when he came -> hành động xen vào -> quá khứ đơn, I was watching a football match on TV -> hành động đang xảy ra -> quá khứ tiếp diễn ).

3 C were knowing -> knew ( hai hành động xảy ra liên tiếp nên chia quá khứ đơn ).

4 D for -> since ( last week là mốc thời gian -> dùng " since " ).

5 C hear -> hearing ( loof forward to + Ving ).

6 C don't talk -> not to talk ( ask + SO + ( not ) to V ).

7 B ask -> asked ( would you mind + if + S + Ved/2 )

8 B more tiring -> more tired 

9 C visited -> have visited ( This is the first/second + time + hiện tại hoàn thành )

10 A are -> were ( used to :đã từng -> vế trước chia quá khứ đơn ).