Rewrite the following sentences as required (根据所给要求，改写下列句子。)
【小题1】Mary has to take care of her little brother at weekends. (改为否定句)
Mary_____ _____ to take care of her little brother at weekends.
【小题2】The students in Class 5 write a diary in English every other day. (对画线部分提问)
______ ______ do the students in Class 5 write a diary in English?
【小题3】The headmaster took some students to the 3D Printing Lab just now. (改为被动语态)
Some students_____ _____ to the 3D Printing Lab by the headmaster just now.
【小题4】“Has Mr. Green decided on the date for the spring outing?" Sam asked. (改为宾语从句)
Sam asked_____ Mr. Green_____ decided on the date for the spring outing.
【小题5】We hope that we will get the first prize in the coming speech contest. (改为简单句)
Our hope is____ ____ the first prize in the coming speech contest.
【小题6】Professor Li offered help while the students were busy doing their project. (保持句意不变)
Professor Li ______ the students ______help while they were busy doing their project.
【小题7】a lot of time, Kitty, it, to do word puzzles ,took, last summer holidays   (连词成句)
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