Complete the second sentence so that it has a similar meaning to the first

complete the second sentence so that it has a similar meaning to the first 
7.The word is so difficult that we can't spell it
->It's uch
8.It's necessary to revise new words regulary
->You
9.The film's ending is dramatic
->The film
10.The last time we saw her was on Christmas Day
->We haven't
11.I haven't eaten this kind of food before
->This is
12.It started raining an hour ago
->It has