I am always delighted when I receive an e-mail from you. the party on July 1st, I shall be

I am always delighted when I receive an e-mail from you. the party on July 1st, I shall be pleased to attend.
A. On account of
B. In response to
C. In view of
D. With regard to

A. On account ofB. In response to C. In view of(答案→)D. With regard to解析：考查介词短语辨析。句意：当我收到你的电子邮件时，总是很高兴的。关于7月1日的聚会，我将非常高兴参加。A. On account of因为，由于B. In response to 对……做出回应C. In view of 考虑到，鉴于D. With regard to关于，至于。根据句意，选择D。

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