I think _______ is really difficult for us to work out this kind of math problem.

ark. How was the musical evening—– Excellent! Ales and Andy performed_________ and they won the firs prize.

I hope you don’t mind my opening thewindow.— _____ . It’s much too hot here.

What did Tina say — Sorry, I didn’t ________ what she said.

（2014山东省实验中学高三第二次模拟考试）6．Jack and Samantha ____________ for their wedding for a whole week but nothing is really done