How can you finish the work____nobody's help?填介词

How can you finish the work____nobody's help?填介词
Holly is very popular at school,and Maria is popular,too(同义句）
_____Maria _____Holly are popular at school.
Good friends can keep a secret (对 keep a secret提问）
Kate is the tallest girl in her class(改为同义句）
Kate is _____ ______ ______ _____ girl in her class.
The weather in China is not the same as that in Australia(同义句）
The weather in China is _____ _____ that in Australia.
There are some differences ____ the twins.介词 应该怎么填？