Sự mất cân đối giữa cây công nghiệp, cây ăn quả và cây lương thực dẫn đến tình trạng gì?

Trả lời giúp mình với 

Most teenagers love ______________ contests of knowledge.
A:taking part in
B:take part in
C:took part in

You ______________ to finish that exercise right now .
A:may
B:should 
C:ought

You shouldn’t watch TV too late, Hoa.
A:You ought not to watch TV too late, Hoa.
B:You ought to watch TV too late, Hoa.
C:You ought not watch TV too late, Hoa.

Walking is a fun, easy, and inexpensive _______________. 
A:act 
B:activity 
C:active

My father is a ______________ worker . He works very ______________ 
A:careful - careful
B:care - careful
C:careful - carefully

Quang Hai is a ______________ soccer player. 
A:well 
B:good
C:best

Soccer is the_____________popular game in the world.
A:more
B:as
C:most