Our country will try to make greater progress in improving people's living conditions，________low­income families.

We’ve published large quantities of books. This year______ we’ve published three million copies.

33. The employees have not been paid _______ since the new manager took over this company last month.

______ acupuncture developed, the simple “bian stones” were replaced first by stone  and pottery needles, and ________ by metal needles.

It’s true that the old road is less direct and a bit longer. We won’t take the new one, _______, because we don’t feel as safe on it.