It’s summer in China now,but it’s winter in A____

It is summer in China now,but in In China it's summer is from We have summer,fall,winter,and (s ).But when it's fall in (C It's hot in summer( )cold in winter. it's( )in winter in north of China When it's______in China,it's summer in America When it's winter in Beijing,it's summer in Sydney why is it hot in summer while cold in winter?it's because we It's hot in summer here ,( A ) it is not cold in winter .A.b Finally,in china!Long trip but I sleep most of it、Now let's .---Does it s( )in winter in Toronto? "When it's summer in China,what season is it in Australia?"的