根据句意,用所给单词的适当形式填空
I doubt whether the song is worth _______(listen) to .
The scientist has devoted his life to (build)his hometown.
Mary _____(prefer)milk to coffee when she was young.
—We’ve missed the last bus!
—I’m afraid we have no ________(choose) but to take a taxi.
After working for over ten years ,he became the CEO of a company only in his (forty)