What (11)this? (12) a backpack． It's my (13) What's that? It’s a (14) ．It is (15) computer．Is that a computer， too? (16) ．It’s a TV set． It’s(17) TV set． I (18) it (19) Saturday evening． It is a (20) TV set．

(  )11．

55． That is my watch．（改为否定句）

________ ________ my watch．

54． you， do， eraser， how， spell【连词成句）

________________________？

1．假如Lucy拾到一串钥匙，请帮她写一则招领启事。联系电话：521-1314。

2．假如Tom Green的学生证丢了，请帮他写一则寻物启事。联系电话：521-3344．

53．This is a baseball in English．（对划线部分提问）

________ ________in English?

52． Is that your pencil shar．pener?（作否定回答）

No，________ ________

51． This is my book．（改为一般疑问句）

________ ________your book?

50．________

49．________

47．________

48．________