题目

81.Tom just s    (吞下) what his mother gave to him. 82.Our teacher told us the d    (截止日期) is tomorrow. 83.Everybody please f    (系上) your seat belt because we are flying. 84.Jim lost this l    (行李) in the airport. 85.A man-made tail is created for Grace to a    (调整) her way of swimming. 86.John gathered up all his strength and decided to a    (参加) the job interview. 87.Don’t be such a s    (自私的) person to only think about yourself. 88.How to be a good person really d    (值得的) our thinking. 89.As a n    (本土的) speake3．已知：如图，在△ABC中，以AB为直径的⊙O分别交AC、BC于点D、E，且AD=DC．（1）求证：AB=BC；（2）过点B作⊙O的切线，交AC的延长线于点F，且CF=DC，求sin∠CAE的值．