IV. 课文语言点及应用（共四节，满分35分）

第一节：单词拼写（共10小题，每小题1分，满分10分）

76. Before Christmas Eve, people will ___________ (装饰) the house and the Christmas tree.

77. The experts are _________ every part of the island. (exploration)

78. Hosting the Olympic Games is a great honour and a great _____________. (responsible).

79. He took part in the competition _____________ (confidence).

80. We were _________ to death by the insects while camping. (咬)

81. Mr. King has r_________ (代替) Mike as captain of the team.

82. The number of children in the school has ____________ (减少) this year.

83. This child is clever and quick-minded, and he is of high i_____________..

84. Friendship is to be strengthened by ______________ (奉献).

85. The antique watch is very ___________ (value)

表面迁移包括哪些烧结机构？当烧结进行到一定程度，孔隙产生封闭后，它们起何作用？