句型转换，按括号内的要求转换下列句型，每空一词。
1.Sometimes you’re supposed to come early.(改为否定句)
Sometimes you supposed to come early.
2. Mrs.Smith is busy. She is doing her housework now.
Mrs.Smith is her housework now.
3.Tom visits his grandparents once a week.(对划线部分提问)
does Tom visits his grandparents?
4.My pen pal is from America.(用Japan改为选择疑问句)
Is your pen pal is from America ?
5.The teacher said，“Don’t cheat in exams，children!”
The teacher told the children cheat in exams.
The Bridge connecting Nantong to Zhangjiagang is 11，072 metres long． （对划线部分提问）
is the bridge connecting Nantong to Zhangjiagang？
Dr Ma laid his papers on the desk for the young doctors to study． （改为一般疑问句）
Dr Ma his papers on the desk for the young doctors to study？
Dr． Ma cured the old man' s serious eye problem two months ago．（改为被动语态）
The old man's serious eye problem by Dr．Ma two months ago．
Suzy didn' t know when she would take a boat trip on the lake．（保持句意基本不变）
Suzy didn't know take a boat trip on the lake．
The students in our school are polite． They never push in before others．（合并为一句）
The students in our school are polite push in before others．