选词填空。
（1） The pumpkin is ___________ than the apple. ( heavy, heavier )
（2） Jim is 150cm. Ben is 155cm. So Ben is 5cm ____________ than Jim. (tall, taller )
（3） I’m as ____________ as my brother(short, shorter). But he’s __________than me. (fat, fatter )
（4） My birthday’s ______________ the 3rd of December. (in, on )
Is your birthday ____________ December, too ? (in, on )