57._________A.military B.social C.industrial D.ec

In paragraph 2," the most important four" refers to ______.A．military positionB．businessC．

57._________A. recipesB. projectsC. receiptsD. in

57._________A.smallB.hugeC.simpleD.colorful

57._________A. chooseB. watchC. drawD. recognize

57._________A. whereB. whatC. thatD. how

57._________A. birthplacesB. playgroundC. reserve