单项选择题

______give us help is welcome.

A. Who ever
B. Whoever
C. No matter who
D. Those who
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单项选择题
This passage is mainly about______.
A．the advantages of traditional surveying methods
B．using satellites to communicate with mountain climbers
C．obtaining new information about a mountain
D．controlling satellites from the top of a mountain
单项选择题
______contributed most to the success of the new study of Mount Everest
A．Detailed maps from previous studies
B．Recent advances in technology
C．Plenty of funding for the study
D．Experience carrying heavy loads up mountains
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