2021年5月15日，祝融号火星车成功降落在火星上，实现了中

2021年5月15日，祝融号火星车成功降落在火星上，实现了中国航天史无前例的突破。以下分析正确的是 $($ 　　 $)$

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相关试题

Chen Wei isn't at school today ________ he is taking a robot competition in Shanghai．（　　）

A．

B．

because

C．

before

D．

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It was late．She opened the door ________ because she didn't want to wake up her grandma．（　　）

A．

angrily

B．

quietly

C．

loudly

D．

heavily

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Meimei is going to be an older sister．Her parents are planning to have their ________ child．（　　）

A．

one

B．

two

C．

first

D．

second

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Students do less homework now．Usually it ________ before 9 o'clock in the evening．（　　）

A．	finishes	B．	finished
C．	is finished	D．	was finished

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Must we finish the work today？

________．We have something else to do tomorrow．（　　）

A．	Yes，we can	B．	No，we can't
C．	Yes，we must	D．	No，we needn't

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