民族区域自治制度是适合我国国情的基本政治制度。这一制度的前提和基础是
--- I don’t know if he _____ today. ---- I think if he _____ , he ______
He _____ every Sunday volunteering in an old people’s home.
He gave me two answers to the question, but _____ of them is right.
--- He lost his new pen. ---- ________
If you _____ him the truth, you _____ you are honest.