10.A : Mom, I’m so sad. Mike broke up with me because I am not as pretty as Mandy and then he fell in love with her.I can’t stop crying.
 B : Oh, dear, that will be all right. Let it go. After all, ________________________. Cheer up. You are always mymost lovely girl in the world.
(A) like mother, like daughter
(B) you have to kiss a lot of frogs to find your true prince or princess.
(C) when a blind man leads another, both fall down
(D) no pains, no gains