We _____ the festival since the first pioneers arrived in America.

A. celebrates B. celebrating

C. celebrated D. have celebrated

D 【解析】句意：自從第一批開拓者來到美國，我們就慶祝這個節(jié)日�？疾閯釉~時態(tài)辨析題。since the first pioneers arrived in America自從第一批開拓者來到美國，這個是一段時間，用于現(xiàn)在完成時態(tài)，we是復數(shù)人稱，需用“have+過去分詞”結構；根據(jù)句意語境，可知選D。
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