The teacher entered the classroom,_by a group of children（）
A. having followed
B. following
C. having been followed
D. followed
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Great Britain is on its way to withdraw from__（）
A. the North Atlantic Treaty Organization
B. the United Nations Security Council
C. the European Union
D. the Group of Seven
_a girl had fallen into the river, he took off his coat and jumped into the water（）
A. Having found
B. Having been found
C. Finding
D. Found
Which of the following wasNOTa thing of value left behind by Romans（）
A. cities
B. enormous wealth
C. the Roman Roads
D. Welsh Christianity
Would you mind_here（）
A. me smoke
B. my smoking
C. I smoke
D. to smoke
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