92. He works very hard so h_______ he will pass the coming exam.

91. Are you certain one of the top officials will i______ the construction site of Three Gorges Dam?

90.Without your teacher’s p__________________ , you can’t leave the school.

89.After talking to his friends, he c_____________ that a book which answered such questions might be popular.

88.The d_______ of oil on their land made the family rich.

87. The firemen b_______ went into the burning house.

86. On his a_______ at the airport, he received a warm welcome.

85. moustache　 A. associate　 B. attach　　 C. science　 D. branch

84. proud　　　 A. rough　　 B. wound　　 C. outing　 D. moustache

83. differ　　　 A. serve　　 B. forward　 C. nurse　　 D. her