__ is/are the most important mineral resources in Great Britain（）
A. Coal
B. Iron ore
C. Oil and natural gas
D. Limestone
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The established church of England and Wales is__（）
A. the Church of England
B. the Free Churches
C. the United Reformed Church
D. the Church of Scotland
Jack has given up_（）
A. smoking
B. to smoke
C. having smoked
D. smoke
From 700 B.C., the Celts came from the__ and began to inhabit British Isles（）
A. Iberian Peninsula
B. Lower Rhineland
C. Scandinavian countries
D. Upper Rhineland
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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