在下列各句的空格上填上一个适当的完整的单词，该词的首字母已给出。
I’d like to write him a letter, but I don’t know his a___________.
J___________ the English club at school was the best way to improve her English.
If I had a million dollars, I would give it to medical r_____________.
Lucy was very t_____________, so she drank two glasses of water.
You can have any of these cakes e___________ this one ,it’s for my mom.