从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1. — did you find the exhibition?
—Oh, great success!
A. What; what a B. How; what a
C. What ; how a D. How; how
2. He a history book to find out the dates of the French Revolution.
A. referred to B. looked up C. looked at D. looked out
3. It wasn’t until nearly a month later I received the manger’s reply.
A. since B. when C. as D. that
