1,B(你的问题不完整,不过Mary应该是个女的,后面用her没错)
2,B(on the other是on the other hand的缩略,“另一方面”)
3,B(present for you给你的礼物,with best wishes带着我们最美好的祝福)
4,无答案,than those you gave me或者than the ones you gave me
5,A(be kind to对某人好,be strict with对某人严厉,be strict in在某方面严格要求)