SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
Thisdiploma(毕业文凭)________thatyouhavecompletedhighschool.
设随机变量(X,Y)服从二维正态分布N(0,0;1,4;-1/2),随机变量中服从标准正态分布且与X独立的是()
She________hernervousnesstotheimportanceoftheinterview.
Onlya(n)________fewwereinvitedtothedancingparty.
邮箱：