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。
小题1:I can see many beautiful Christmas __________ (装饰) on the streets.
小题2:She was always __________ (乐观的), even when things were at their worse.
小题3:A cinema is a public place of __________ (消遣).
小题4:He prefers going on with his work to __________ (退休).
小题5:He is to be __________ (祝贺) for his success.
小题6:It is reported that an aircraft c__________ near the city but luckily no one was killed.
小题7:Little Tom wrote “Granny, Heaven” on the e__________, and then gave it to his father to post.
小题8:A few of the students failed in the examination, you i__________.
小题9:I don’t know if we can help – that d__________.
小题10:The doctor had to cut off his left leg and fix an a__________ leg for him.
小题1:decorations
小题2:optimistic
小题3:entertainment
小题4:retiring
小题5:congratulated
小题6:crashed
小题7:envelope
小题8:included
小题9:depends
小题10:artificial
题目分析：
小题1:decorations 根据上文的many说明这里使用复数形式。
小题2:optimistic 形容词乐观的：optimistic
小题3:entertainment 名词娱乐entertainment，由动词entertain娱乐转换而来。
小题4:retiring 考点固定结构prefer doing A to doing B 宁愿做A而不愿做B。
小题5:congratulated 动词祝贺congratulate。根据句意说明使用被动的形式。
小题6:crashed 动词crash撞击；坠毁。
小题7:envelope 根据write说明写的是信件，所以是在信封上写。
小题8:included 动词include包括；you与include构成被动关系，故使用过去分词的形式。
小题9: depends 固定词组it depends视情况而定
小题10:artificial 根据上文的cut off his left leg说明是把腿切除，如何撞上假肢，人造的artificial
点评：单词拼写考察实词居多，特别应注意名词单复数的变化，动词时态语态的变化，形容词和副词的变化。