75. Today is so cold. The temperature is b__________ zero.

74. Xi’an is the city where many a_________ emperors made the capital.

73. I hope we’re not moving t__________ the war again.

72. Please k_________ on the door before entering.

71. After reading the letter, he t_________ it in the waste-paper basket.

70. She was wearing a new dress, but he didn’t even n_________ it.

69. Of the 7 brothers only 4 now r________, the rest are dead.

68. The price of oil has r_________ to $100 a bucket.

67. This class is too large. We shall have to d________ it.

66. About 5000 cars were p_________ in the factory last month.