80. Tickets for the 2008 Beijing summer Olympics will go on s________ in early 2007. 　

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79. –Why did you go there w_______ breakfast? -- I wanted to catch the early bus.

78. The teapot on show was used for k_______ hot water in old days.

77. December is the t________ month of a year.

76. I w_____ whether he will come back.

75. The boy was too f____________ to move, because he had never seen such a terrible animal.

74. Sorry, I’m not free now. I’m b_____ doing my homework.