根据下列各句句意及所给单词的首字母或汉语提示，用正确形式的单词填空。
I can see many beautiful Christmas __________ (装饰) on the streets.
She was always __________ (乐观的), even when things were at their worse.
A cinema is a public place of __________ (消遣).
He prefers going on with his work to __________ (退休).
He is to be __________ (祝贺) for his success.
It is reported that an aircraft c__________ near the city but luckily no one was killed.
Little Tom wrote “Granny, Heaven” on the e__________, and then gave it to his father to post.
A few of the students failed in the examination, you i__________.
I don’t know if we can help – that d__________.
The doctor had to cut off his left leg and fix an a__________ leg for him.