A:wondering
B:wandering
C:walking
D:thinking of
我好奇地问爸爸____这些怪石是哪里来的____这都是大自然这位雕塑家的杰作啊____爸爸不假思索地回答____
In Switzerland, things like glass and plastic _____ into different groups and then recycled
The giant hears some sounds. ( )