方程x（x+1）=0的解是______．

小题1:Mr.Wang is always the first to get to school and the l _ to leave school.

小题2:Kanas Lake is a very beautiful place.A large number of _ (旅游者) come here to enjoy themselves every year.

小题3:Dan Lang's songsquite______(流行) today in the whole country.

小题4:There is too much noise in the classroom. Please speak more______(大声的)。