32.The Russian rocket designer has died.For many years,he ______ as an important assistantThe Russian rocket designer has died.For many years,he ______ as an important assistant to the father of Soviet space program.A.serves B.was serving C.served D.

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32.The Russian rocket designer has died.For many years,he ______ as an important assistantThe Russian rocket designer has died.For many years,he ______ as an important assistant to the father of Soviet space program.A.serves B.was serving C.served D.

32.The Russian rocket designer has died.For many years,he ______ as an important assistantThe Russian rocket designer has died.For many years,he ______ as an important assistant to the father of Soviet space program.A.serves B.was serving C.served D.
32.The Russian rocket designer has died.For many years,he ______ as an important assistant
The Russian rocket designer has died.For many years,
he ______ as an important assistant to the father of Soviet space program.
A.serves B.was serving C.served D.has served

32.The Russian rocket designer has died.For many years,he ______ as an important assistantThe Russian rocket designer has died.For many years,he ______ as an important assistant to the father of Soviet space program.A.serves B.was serving C.served D.
选择D 完成时表示对现在造成的影响
serve as
充当, 担任；为
例如
He has knocked about the world for many years.
他在世界上漂泊多年
希望能帮助到您

选择D.

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