1 . ________ he asked the villagers on the banks of the river where he could find the legendary (传奇的) artist, they smiled and pointed down the river. (用适当的词填空)

2 . How long do you think it will be ________ China sends another manned spaceship?

3 . Keep an eye on my suitcase _____I buy my ticket. (用适当的词填空)

4 . He did not stop to rest____he finished the work. (用适当的单词填空)

5 . You can get respect from others only ________ you respect yourself. （用单词适当形式填空）