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题型：单选题题类：模拟题难易度：普通

——Have you heard of Kunming terrorist attack?
——Yes, it happened ________ March 1^st, 2014.

A、on B、in C、at D、for

举一反三

What are you doing vacation?

Simon is a good guy _________ his bad temper.

I found a schoolbag in the music room. Please e-mail Mary ______ mary@163.com.

I heard from my pen pal yesterday, but I haven't replied ____ her.

Neil Armstrong was the first man to walk on the moon _______20 July 1969.

Our life is full happiness.

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