He hurried to the station only _______ that the train had left.
A:to find
B:finding
C:found
D:to have found
如图,△ABC∽△AED,∠ADE=80°,∠A=60°,则∠B等于( )
给下面语句标上标点符号。
夫君子之行静以修身俭以养德非澹泊无以明志非宁静无以致远
君臣礼仪是中国古代政治制度发展的外在表现,图1到图3的变化反映的实质是( )