—What a nice camera!—Yeah. It _______ Beijing.
—Thank you for the nice meal you offered us! —_______.
—Are you _______ to go hiking with us?— Yes, I _______.
—You should be careful when _______.—Yes, I will. I’d like to know when ________ to have a rest.
—How do you like the film Titanic?—I must say it’s _______ film I _______.
I never doubt ______.