Dr. Hamiltonian was only going to make some introductory remarks, but______giving the speech himself when the speaker came down

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问题 Dr. Hamiltonian was only going to make some introductory remarks, but______giving the speech himself when the speaker came down with the flu.

选项 A、set up
B、turned up
C、ended up
D、come up

答案C

解析 动词词组辨析。set up“建立,准备,安排”;turned up“开大,翻起,出现”;end up“结束,最后处于”;come up“发生,上来,提到”。根据语境,空格处的词组应表示“结束,完成”的意思。故答案为C。
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