1 . In fact, these traditional festivals have developed into occasions for only entertainment though people ______ them on time.

A．observe

B．approach

C．congratulate

D．attend

2 . If you saw a father patting his son on the back, you would probably think that the father was ________(祝贺) his son on doing something well, maybe passing an exam or winning a race. （根据汉语提示单词拼写）

3 . The authors are to be c_________(to tell sb. that you are pleased about their success or achievement) on producing such a clear and excellent work. (根据英文提示单词拼写)