我国“十二五”规划明确指出:“要坚持和完善以公有制为主体、多种所有制经济共同发展的基本经济制度。”这项基本经济制度是由( )
Nowadays, more and more people would rather ____ __ in the country, because there is ______pollution there than in the city.
Dr. Ma is strict ______ local doctors and nurses, especially________their skills.
---When did you go to bed last night? ---______________
It rained so_______ that people could _______ go out yesterday morning.
—I find the more we study, the more difficulty we have _______ out Maths problems. —Oh, I agree with you. Maths is more and more difficult.