1 . __________the forecast predicted, the weather was horrible for the whole weekend. (用适当的词填空)

2 . There seems to be little doubt __________ man has had an impact on the Earth’s climate. (用适当的词填空)

3 . Once he __________ __________ __________ __________ (下定决心), nothing can prevent him. (根据汉语提示完成句子)

4 . ______ seemed as if the world were coming to an end. (用适当的词填空)

6 . The study of sociology ________ (重合) with the study of economics. (根据汉语提示单词拼写)

7 . It was in my senior high school ________I met the well-respected teachers ________I made great progress in many aspects.

A．that; that

B．where; when

C．that; when

D．where; that