Mathematics a very important and interesting subject.

Mathematics is a very important and interesting subject.

Long , linger, the longest
short, shorter, the shorter
large,larger,the largest
big,bigger,the biggest
fine,finer,the finest
straight,straighter,the straightest
new,newer,the newest
old,older,the oldest
few,fewer,the fewest
young,younger,the youngest
easy,easier,the easiest
busy,busier,the busiest
light,ligher,the lightest
clen, cleaner,the cleanest
small,smaller,the smallest
thin,thinner,the thinnest
thick ,thicker,the thickest

good,better,the best
much,more,the most
bad,worse,the worst
little,less,least
many,much,the most

interesting,more interesting,the most interesting
difficult,more difficult,the most difficult
comfortable,more comfortable,the most comfortable
important,more important,the most important

Here are the answers:

10. We (recognized) Sam before he understood it.

11. Mr. Rees (has just rented) a new house and now she is there.

12. They (will have received) the money by the end of the next month.

13. Belinda (had squashed) the lemon before she started making the pies.

14. Gregory (will have insured) his flat by the end of this year.

15. Tom's puppy (has eaten) the bone and is still waiting.

16. Granny (had mashed) the potatoes before we got up.

17. My aunt (will have cancelled) the meeting by that time.

18. Mrs. Hankoff (had corrected) the text before we came