请你修改以下的每个句子，每句有1处语言错误，错误涉及一个单词的增加或修改。
增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。
修改：在错的词下面划一横线，并在横线下面写出修改后的词。
注意：每处错误及其修改仅限一词。
【小题1】It’s no use spend so much money on new clothes.
【小题2】I delayed to answer your letter because I had been away for a week.
【小题3】Writing stories and articles are what I enjoy most.
【小题4】Remember putting back the magazines when you have finished it.
【小题5】She decided to devote herself to study the problems of old age.
【小题6】They are considering to buy before the prices go up.
【小题7】After finishing his homework he went on writing a letter to his parents.
【小题8】I don’t mind to travel by bus, but I hate standing in queues.
【小题9】Do you feel like to go out or would you rather have dinner at home?
【小题10】The young trees we planted last week require to look after with great care.