六、词汇（本题共25小题；每小题1分，满分25分）

A. 根据句意和汉语提示写出单词，完成句子。

76. He is one of the __________(  先锋 ) of modern science.

77. Food safety ________________ (影响) our everyday life.

78. Reading after the tape can improve our　　 　 　________(发音).

79. The product of this company has reached the international ____________ (标准), so it sells well all over the world.

80. His parents died when he was very young, but love was never          (缺席的) from his childhood.

B. 根据句意，用所给单词的适当形式填空。

81.How ____________you are to make such a mistake!  (careless)

82.I can’t understand his           (silent) on such an important matter.

83. If you take more exercise, you will be               (health).

84. To everyone’s     , still many people are trapped under stones after the earthquake. (sad)

85. Li Ming goes to see his grandparents at a ________ (fix) date every month..

C. 根据句意，用所给动词的适当形式填空。

86. She wonders if there _______(be) a flower show next week.

87. At last several of the runners ________(fall) behind in the race.

88. Jack devotes as much time as he can to__________(help) others.

89. The railway ________(connect) Qinghai to Tibet is the longest plateau (高原) railway in the world.

90. If you _______(not be) careful enough when crossing the road,a car may hit you.