1 . No sooner had I begun to understand how British people communicate _______ it was time to head back home. (用适当的词填空)

2 . 如果有必要，你最好查字典。
____________， you'd better refer to the dictionary.

3 . ________great fun it was marching along the streets, enjoying the festive atmosphere! (用适当的词填空)

4 . Only after they had discussed the matter for several hours ________ (他们才作出决定). (根据汉语提示完成句子)

5 . I learned a lot about agriculture when ________ (pick) fruit on the farm. (所给词的适当形式填空)

6 . It wasn’t until in high school ________ I began to trust other people again. (用适当的词填空)

7 . John talked with me for about an hour yesterday. Never ________ (我以前从未听过他说那么多话). (根据汉语提示完成句子)