A manned mission to Mars would allow a more in depth study of the Red Planet , and many have argued that construction a permanent base on Mars is much more practical than build one on the Moon Here, which two underlined sections need to be changed to correct the sentence?

A manned mission to Mars would allow a more in depth study of the Red Planet , and many have argued that construction a permanent base on Mars is much more practical than build one on the Moon Here, which two underlined sections need to be changed to correct the sentence? Correct Answer a,d

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'The post must be manned immediately.' Here the underlined word is -
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"The post must be manned immediately".Here the word "man" is used as-
'The post must be manned immediately'. Here the word 'man' is used as--
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