misc

The tasks (different) from each other

(a)  

The (difficult) of this task is very high.

(a)  

There is a (different) between life and death

(a)  

This exercise is very (use). I learned a lot from it

(a)  

The (use) of textbooks is forbidden during the exam

(a)  

This car is (use). I can't drive it

(a)  

(Science) have discovered a new chemical element

(a)  

They're doing (science) research

(a)  

This IT product has long been in (develop)

(a)  

These are (develop) countries

(a)