根据句意,用括号内所给英语单词的适当形式填空

根据句意,用括号内所给英语单词的适当形式填空
What are the______(different)between British English and American English?
China has the ______(lange)population in the world
Let's cut the cake into two ______(half)
People's living conditions are improving_____(rapid)in China.
He thought this question is full of _____(difficult)