—How many people were invited to the meeting?
—About six ________.
A:hundred
B:hundreds
C:hundred of
D:hundreds of
图中,①②③④地均为大西洋两岸的陆地,则②大洲是( )
如图,直线AB∥CD,∠B=50°,∠C=40°,则∠E等于( )