改写句子，根据各小题Ａ句的意思完成Ｂ句，使两句的意思基本相同。每空限填一个单词。（共１２分）
小题1:A: His friend didn't know what he should do.
B: His friend didn't know do.
小题2:A: What was wrong with the old man？
B: What the old man？
小题3:A: He found it was not easy to sleep.
B: He found to sleep.
小题4:A: He went to bed at twelve last night.
B: He go to bed twelve last night
小题5:A: She was worried and her friend was worried, too.
B: She was worried and her friend.
小题6:A: She always makes me happier when I’m unhappy.
B: She always me when I’m unhappy.
小题1:what to
小题2:happened to
小题3:it hard/difficult
小题4:didn’t until
小题5:so was
小题6:cheers up
题目分析：
小题1:句意：他的朋友不知道做什么。这是由复合句变为简单句，要把宾语从句what he should do变为疑问词＋不定式，故填what to。
小题2:句意：这个老人怎么了？＝这个老人发生了什么事？故填happened to。
小题3:句意：他发现睡觉不容易。这是由复合句变为简单句，把宾语从句 it was not easy to sleep变为it hard to sleep，it 为形式宾语，直正的宾语是不定式to sleep，not easy=hard/difficult，故填it hard/difficult。
小题4:句意：昨晚直到12点他才睡觉。not…until 直到……才，时间状语是昨晚，所以要用过去时，否定要找助动词did，在其后加not，故填didn’t until。
小题5:句意：她很担心，她的朋友也是。“so+系动词｜助动词｜情态动词＋主语”表示前者的情况适合后者，故填so was。
小题6:句意：她总是在我不开心时让我高兴起来。make happier＝cheer up ，因为主语是she ，要用第三人称单数形式，故填cheers up。
