At the last moment, Tom decided to         a new character to make the story seem more likely.

 How much does traveling around France by taxi __________?

My father ______ my mother when they were both 26 years old, and they have ______ for 15 years.

--Mr. Wu, please _____ how much time you need to finish your homework.-- All right. I’ll make it(做到) at once.

They tried several times to       the problem, and in the end they succeeded.