She devoted herself __________ to her research and it earned her a good reputation in her field. 

We must behave ____ at a formal table.

It was raining heavily. Little Tom felt cold, so he stood ______ to his mother.

However weak we are，we can still do something against the powerful nature so long as we are     prepared．

In my view, London's not as expensive in price as Tokyo but Tokyo is______in traffic.