根据下列句子及所给单词的首字母，在答题纸上按题号写出各单词正确的完全形式（每空限写一词）。
Generally speaking, when taken according to the d______, the drug has no side effect.
The smile on his face put us at e______ immediately.
There is c______ evidence of a link between exposure to sun(日光暴晒) and skin cancer.
I r______ to tell you that I am unable to accept your kind invitation.
The couple are always a______ with each other about money.
The game attracted over 500 competitors r______ 8 different countries.
The explorers were told to e______ themselves with everything they would need for the voyage.
When we visited my old family home, memory came c______ in.
It was w______ that he was caught stealing in a department store.
At the meeting they discussed three different a______ to the study of mathematics.