单项选择题
Britain’s longest rivers are（）.
A.the Severn and the Clyde B.the Thames and the Clyde C.the Clyde and the Humber D.the Severn and the Thames
单项选择题 Northern Ireland,which takes up the northern fifth of Ireland,is a fourth political division of（）
单项选择题 Scotland occupies the（）third of the island of Great Britain in the British Isles.
单项选择题 England has three main land regions.They are the Southwestern Plateau,the Pennines,and（）.
