Fly the kite when a ___86_____ appears to be coming on .Stand inside a door or under some __87____, so that the silk ribbon does not get wet. Take care that the string doesn’t touch the wall or the door. When a thundercloud comes over the kite, the__88___ piece of metal will pull the electricity from the cloud. The kite and the string will become __89____. When the kite and the string are wet from the rain, they will conduct the electricity very well. You can __90____ and store the electricity in the condenser and use it for other experiments

85.She went abroad for further study with the __________(目的) of finding a good job.

84. Special puzzles have been designed to test the ________(智力)of the children.

83. ______(环境的)protection should be put at the top of the list for each country.

82. I have never______(后悔) my decision to come back to my motherland.

81. We can draw the ______(结论)　that the two chemicals do not react.

80. This material ______(传导) electricity.

79. It is ____(不必要) to ask him to change his mind.

78. I have _______(解释) the cause many times to the audience to keep a positive image.

77. The _____(　气候) 　in Chongqing is always mild.