写出下列各词的比较级形式，然后总结一下形容词比较级形式构成的方法。每小题1分，共10分。
（1）old ______ young ______ short _____
（2）big _____ thin _______ hot ______
（3）heavy _____ funny ______ angry _____
( ) He is five _________ old.
A. year B. years C. a year
( ) We live _________ Canada.
A. in B. a C. /
( ) Are you warm _________ cool?
A. orB. to C. and
( ) -- How many _________ do you have?
-- I have one __________.
A. pen, pens B. pens, pen C. pen, pen
( ) -- What’s her name?
-- __________ name is Jenny.
A. My B. His C. Her