1.His plan sounds wonderful,but it is difficult to carry it out.
2.There is no doubt that money is something,but it is not everything.
3.May I borrow this book for another two days?
4.Only when you lose it,can you see its dearness.
5.We have a lot to do to make the sky,the ground and the water cleaner in our city.
6.The newly-built expressway is wide enough for vehicles to drive on side by side in six lines.