【正文】
知識(shí)拔高 The mother pig is _____ than the son pig. The mother pig is _____ _____ _____ than the son pig. The black pig is 100 kg, the red pig is 50 kg. The black pig is ___ ___ ____ ____ the red one. The big cat is 5 years old, the small cat is 1 year old. The big cat is ____ ____ ____ _____ the small one. The yellow dog is 120 cm tall, the white dog is