句子 （共10小题；共15分）
按要求完成下列各题。每空一词，缩写算一词。（共5小题；每空0.5分，共5分）
He has two ping-pong bats. （改为否定句）
He                    two ping-pong bats.
How much are these books? （改为同义句）
        the          of these books?
School Day is on March 6th. （对划线部分提问）
                 School Day?
English and math are interesting and useful. （对划线部分提问）
                 English and math?
The students have lunch at school on weekdays. （对划线部分提问）
                 the students have lunch on weekdays?