根据题后要求完成句子，每空一词，含缩略词．

There were some large sharks in the zoo．(改为否定句)

There ________　________ large sharks in the zoo．

根据题后要求完成句子，每空一词，含缩略词．

He's going to take guitar lessons this weekend．(对划线部分提问)

________ he going to ________ this weekends?

根据题后要求完成句子，每空一词，含缩略词．

I came to school by train last month．(对划线部分提问)

________　________ you come to school last month?

根据题后要求完成句子，每空一词，含缩略词．

He began to learn the piano at the age of seven．(同义句转换)

He began to learn the piano ________ he ________ seven．