已知全集U=R,A={x|x≤0},B={x|x≥1},则集合∁U(A∪B)=( )
A:{x|x≥0}
B:{x|x≤1}
C:{x|0≤x≤1}
D:{x|0<x<1}
____ (Summer /Spring) is green. Spring is ____ (hot /warm). I smell flowers.