We wrote this letter for two hours. I spend a day painting this house. Dogs are difficult to train

11.    We wrote this letter for two hours.
It took …………………............................................................................………
12.    I spend a day painting this house.
It takes…………………...........................................................................………
13.    Dogs are difficult to train
It’s…………………...................................................................................………
14.    They think that learning English are not easy
They think that it …………………...............................................................……
15.    The weather is too cold for us to go out
The weather is so ………….......................................................................………
16.    The weather is too cold for us to go out
The weather isn’t…………………...........................................................………
17.    The film isn’t interesting for us to see
The film is too…………………...............................................................………
18.    How much is this dictionary ?
 What ..........................................................................................................................................
19.    No house on the street is older than this house.
  This house…………………………………………………………………………….………
20.    How many apples does she want?
  How many apples would……………………………………………………………………..?