73. Are these boxes? (改为单数形式)

　 _________________________________

72. Thai is an egg. (改为否定句)

　 ________________________________

71. This is a book. (改为一般疑问句)

　　 _______________________________

70. ----Welcome to Shanghai.

　 ---- ________ (thank).

69. ----Excuse _______ (I), are you Michael?

　 ----Yes, I am.

68. ----Is that ________ (she) schoolbag?

　 ----Yes, it is.

67. ----Where is Tom from?

　 ---- He is from ___________ (English).

66. ----What`s __________ (he) name?

　 ---- He is Wang Lin.

65. This is my _______________ (钢笔).

D) 用所给词的适当形式填空。

64. The number is ___________ (16).