It was generous............. you to share your food with me. I was late, but............. they waited for me. The Red River.....into the Tokin Gulf

1) It was generous............. you to share your food with me
A. of
B. to
C. for
D. about
2) I was late, but............. they waited for me.
A. lovely
B. luckily
C. extremely
D. silly
3) The Red River.....into the Tokin Gulf
A. flow
B. flew
C. flows
D. is flowing