Moyan got the Nobel Prize in his _________.A. fifties B. fifty C. fiftieth
----- I forgot my mother’s birthday!-----_______ You’d better keep it in mind next year.
----- How soon will you start your journey?-----I’m not sure. I haven’t decided ________.
I never doubt ______ the science museums are worth_______.
-----Jenny, you should prepare as much as you can______ the coming guitar competition successfully!-----Sure, I will try my best, Mr. Brown!
-----Wow, Anna, you look so great in your new coat!-----Thanks. I ______ it when it was on sale.