—Thank you for the nice meal you offered us! —_______.
I think it's well worth ______ our best to learn a second language well.
The thing that matters is not whether you fail or not, _______whether you try or not.
_______ Mrs. Zhang ______ Dr. Yang shows great interest in the topic we are talking about. They want to know more about it.
--Did you enjoy the outdoor training yesterday? -- No, not at all! I was ________ dead after so much hard training.
-- It’s dangerous to walk across the street carelessly. --You’re right. We can’t be ________ careful while crossing the street.