A:However
B:Wherever
C:Whatever
D:Whoever
读“我国某地区主要农作物不同层次生产潜力递减柱状图”(单位:千克/公顷),回答下列问题。
目前人类所能观测到的最高一级的天体系统是
—Oh, I forgot to tell you. Many children ____ (celebrate) Ann's birthday.