若4x2•□=8x3y，则“□”中应填入的代数式是____ ．
已知正方形ABCD的面积为9cm2，正方形EFGH的面积为16cm2，则两个正方形边长的相似比为____．
Yesterday I _______ a great time! （ ）
选出适当的短语，完成句子。
come with playing basketball at home play the piano Whose book
8x＋1.5×6=43
x=____
