早晨在校门口遇到了数学老师，你应对她说： 。

sparing no efforts to create ______ morepeaceful and more advanced world, ______ place where everyone enjoy his lifeand freedom

He _____ more than thirty.

told us the work would be finished by nextmonth, ________ personally I doubt very much.

He usually goes to school ____ bike, but sometimes he _____a taxi to school.