1 . We will put off the picnic in the park until next week, ________ the weather may be better. (用适当的词填空)

2 . That summer,___________the other teams enjoyed their vacations, we met every day and practised passing and kicking the football. （单词的适当形式填空）

3 . I didn't become a serious climber until the fifth grade，________ I went up to rescue a kite that was stuck in the branches of a tree. (适当形式填空)

4 . But my connection with pandas goes back to my days on a TV show in the mid-1980s, _____ I was the first Western TV reporter permitted to film a special unit caring for pandas rescued from starvation in the wild. （用单词适当形式填空）