To review and assess achievements and summarize and exchange experience ______th

游客2023-11-11  21

问题 To review and assess achievements and summarize and exchange experience ______the task of our present Congress.

选项 A、are
B、is
C、were
D、have been

答案 B

解析 主谓一致性题。本题的主语是个较长的不定式短语,谓语动词应用单数,故选[B]。
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