如图所示的向日葵图案是用等分圆周画出的，则⊙O与半圆P的半径的比为（   ）

so far, thanks to, look for, in search of, look forward to
（1） I am____  seeing Frank again.
（2）We have done most of the work____ .
（3）____ my math teacher, I passed the math test easily.
（4）They arrived at the island ____ the unknown plant.
（5）A mother crocodile (鳄鱼) was ____  food near the seaside.