Bonnie looks very smart and is always ________ pink because pink is her favorite color.
A:with
B:on
C:about
D:in
get to school(上学)____
战国时期,各国货币差别很大,影响各地经济交流,秦统一六国后,秦始皇规定在全国统一使用( )
两极冰川面积越来越小,是以下哪个现象造成的( )