.So before I go any further I want to thank you very much for inviting me to this importa

问题补充：

.

So before I go any further I want to thank you very much for inviting me to this important conference.

A. participate in

B. join to

C. take part

D. attend to

答案：

(答案→)A. participate in

B. join to

C. take part

D. attend to

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