用所给单词的适当形式填空。 【小题1】My uncle is a famous _____________(art). 【小题2】The music room is on the _______________ (two) floor. 【小题3】It's _______________ (sun) in Beijing. 【小题4】My sister is good at _______________ (sing). 【小题5】I _______________ (arrive)in Toronto yesterday morning.