Clothing made of man-made fibers has certain advantages over _____ made of natural fibers like cotton, wool or silk.
__it is for us to see that he does his work so well!
Everyone has arrived at eight and ____.
—— My mother does a lot of housework before going to work,but she has never been late. —— _____.
They went into a small house but ___.
Between the two mounts___and they decide to build a ropeway(索道).