已知△ABC≌△DEF,∠A=50°,∠E=60°.那么∠C等于( )
A:30°
B:50°
C:60°
D:70°
找出每组单词中不同类的一项。
①____A. small B. tall C. shoe
②____A. angry B. think C. sad
③____A. window B. where C. what
④____A. to B. go C. do
⑤____A. winter B. week C. summer