单项选择题

The harm radiation has done to the Apollo crew members ()

A. is insignificant
B. is enormous
C. seems overestimated
D. remains unknown

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单项选择题
Which of the following is an independent country()

A. Wales
B. Scotland
C. Northern Ireland
D. The Republic of Ireland
单项选择题
The United Kingdom of Great Britain and Northern Ireland is
A. part of Britain
B. part of British Isles
C. the official name of the whole country England
D. the largest country of all mentioned in the passage
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