87. Tough as the task is, if we act wisely and adopt a good strategy, we can surely _______________

(完成)it.

86. They seem to be talking about something, and I wonder what they are _______________ (低语)about.

85.　 It is i_______________ for individuals to possess a gun in China.

84.　 Due to the financial crisis, our profits continue to d________________.

83.　 I don’t think the chair is f_______________ enough to stand on.

82.　 He fell asleep in class. A__________________, he stayed up late last night.

81.　 He d_______________ a reward for what he has done these years.