单词拼写,根据各句句意及汉语提示，写出单词，每题一词。
（1）、We should be (小心) when we do our homework.
（2）、Many (村民) never leave their hometown.
（3）、Asking for help (礼貌地) is very important.
（4）、All the students are (分散) into four teams to finish them.
（5）、Jack got his driver's license on his (二十) birthday.
