按照要求改写下列句子。

1．David eats lunch at twelve o'clock．（改为一般疑问句）

__________ David __________ lunch at twelve o'clock?

2．What kind of movies is your favorite? （写出同义句）

What kind of movies __________ you __________ __________?

3．They are our friends．（改为单数形式）

__________ __________ my __________．

4．Can Rick work all night? （做出肯定回答）

Yes，__________ __________．

5．She wants to join the chess club．（对划线部分提问）

__________ she __________ to join?

6．We like P．E．because it's exciting．（对划线部分提问）

__________ __________ you __________ P.E．?

7．My art teacher is Mr. Jackson．（对划线部分提问）

__________ __________ art teacher?