根据下列各句句意和空白之后的汉语提示词，在写出对应单词的正确、完整形式，每空只写一词。
小题1:Window screens are ___________(有效的) in keeping out mosquitoes.
小题2:An old man in _____________(寒酸的) clothes came to the door.
小题3:The other possibility, Mr. Jouanny said, was that the _________(小偷) might just like the painting.
小题4:Will it be ______________(方便的) for you to start work tomorrow?
小题5:All of them are______________(教授) of chemistry at Chicago University.
小题6:This is the most important___________(改革)of the police service in over 50 years.
小题7:Just now the police came and __________(逮捕) the man who had robbed the bank.
小题8:The bell____________(表示) the end of the period rang, interrupting our heated discussion.
小题9:We are going to ________________(删除) some names from the list.
小题10:The object of this society is to perfect its members ___________(实际地) and scientifically.