The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
We ______ the national flag when the sun ____ in the east every morning.
Jack wasn’t saying anything , but the teacher smiled at him_____he had done something very clever.
_____ his accent , he is from the south of China.
A: I’ve passed the driving test.B:______!
The party held last night was _______ success; we sang and danced until it came to _____ end at twelve.