StepⅤUnderline the parts of the sentences that which refers to in each case. (B级)
1)…it is full of beauty , with high hills , wooded countryside and picturesque towns and villages, all of which makes it an ideal place to visit .
2)… base yourself in Ludlow, which is the biggest town in this area.
3)Other places worth a visit are the castle ,which defended the town against the Welsh
