阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。71. The situation of unemployment has

阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。
71. The situation of unemployment has not been so serious      (所期待的).  (expect)
72. Tom has been playing basketball on the playground,      (脸上全是汗水).  (cover)
73.      (余下要做的) is an accurate description of the long process of the experiment.  (leave)
74. It’s widely accepted that never in history      (有过) a more successful opening ceremony than that of the Beijing Olympics.  (there)
75. During my last trip my cellphone was left in a hotel accidentally,       (再也找不到) .  (find)
76. He told us that he was very happy      (他现在的处境) . (be)
77. Qian Xuesen went to California from 1935 to 1955,      (在那时期) he concentrated on the research into jet planes.  (period)
78. I have no idea whether the machine can be used again but it      (在维修) in the morning.  (repair)
79. Did you know      (到底怎么) the nuclear explosion occurred in Japan?  (it)
80. The air hostess required that     (我们坐着) until the plane had e to a plete stop.  (remain)