根据下列句子及所给汉语注释,写出空缺处各单词的正确形式,每空只写一词。
They talk _________(代替)of doing homework.
Grace felt _______(紧张的,不安的)when she heard the final exam would come.
She’s too busy to __________(回复)to her daughter’s letter.
You always come up with good _________(解决) to people’s problems.
She tried to stop smoking, and she_________(成功).