is really hard them to climb Mount Qomolangma. A. This , to B. It, for C. This, for D. It, to 查看更多

 

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________ is really hard ________them to climb Mount Qomolangma.

A. This; to

B. It; for

C. This; for

D. It; to

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________ is really hard ________ them to climb Mount Qomolangma.

[  ]

AThis; to

BIt; for

CThis; for

DIt; to

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________ is really hard ________ them to climb Mount Qomolangma.

[  ]

AThis; to

BIt;for

CThis; for

DIt; to

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