— you sing an English song?
—Yes ,I can .
A:Can
B:May
C:Must
D:Need
完形填空
Look! There 1many kites in the2.They are red,yellow and blue.I like 3kites 4 much.But I can't fly very5.My brother Peter can do6 well.He often 7me fly kites.We go out8our kites every Sunday.9my brother's help,now I can fly10.
已知等腰△ABC内接于半径为5的⊙O,如果底边BC的长为6,则底角的正切值为( )