20. It was not until early in the morning ______ he woke up _______ he found _____ he lay asleep on the floor for a night.

A. that; when; that　 B. when; that; /　　　 C. that; that; when　　　 D. when; / that

19. _____ at the end of next month, the stadium is being built day and night by the construction workers.

A. Completing　　　 B. To be completed　　 C. To complete　　　　 D. Completed

18. Practising Chinese Kung Fu can not only ______ one’s strength, but also develop one’s character.

A. bring up　　　　 B. take up　　　　　　 C. build up　　　　　 D. pull up