the hot metal is getting bigger and bigger

the hot metal is getting bigger and bigger it is getting bigger the bass is getting bigger the number of ……is getting bigger and bigger还是larger and lar getting bigger Is the tree getting bigger?改肯定句 it's getting bigger and _(clean) My plane is bigger and stronger.划线部分是bigger Are many cities in the world getting bigger?是什么意思? The elephant is( )bigger than the mouse. the pear is bigger than the watermelon The moon is bigger than the earth. The sun is bigger than the Earth.