This, That, These, Those

This, that, these and those are called demonstratives. We use a demonstrative when we want to talk about whether something is near or far from us and if the subject is singular or plural.

This car is nice (singular, near)
That car is nice (singular, distant)
These cars are nice (plural, near)
Those cars are nice (plural, distant)

Position of demonstratives

Before the noun. –  What are those people looking at?
Before the word 'one'. –  This one is much cheaper than that one.
Before an adjective + noun. – These blue shoes would really suit you.
When it is clear what the noun is. – while eating ice-cream: This is delicious (you do not need to say, ‘This ice-cream is delicious’).

Now answer these demonstrative questions:

• 1) ___ flowers are dead.
  
  These
  This
  
  
• 2) ___ jacket is the most expensive one in the shop.
  
  This
  These
  
  
• 3) This rain __ making me feel depressed.
  
  is
  are
  
  
• 4) Those houses ___ all new.
  
  are
  is
  
  
• 5) When are ___ letters going to be sent?
  
  those
  this
  
  
• 6) Do you remember ___ amazing party we went to last summer?
  
  those
  that
  
  
• 7) Please put ___ magazines back on the shelf.
  
  that
  those
  
  
• 8) ___ traffic gets worse every year
  
  These
  This
  
  
• 9) ___ children are all Italian.
  
  This
  These
  
  
• 10) Whose ___ those keys on the table?
  
  are
  is