单词分类；请根据所给句子的意思，从下面的方框中选出可以填入句子中的单词，并将其字母标号填在答题卷相应的位置。

小题1:Do you know that scientists have            /            water on Mars?
小题2:We all like the music because it is very          /          .
小题3:He is a clever boy and he can play the          /            very well.
小题4:Tony’s father is a famous           /           .
小题5:You should smile when you like            or           .