We should do more such exercises in the future,I think,_____ those we did yesterday.
_______ is known to the world, the Chinese in many places _______ the old traditions.
__________ prices ___________so fast, we can't afford luxuries.
The old man sat in front of the radio every evening, ______ his favorite program.
Each week he tried to _____________ a few dollars for an overseas trip.
He made another wonderful discovery, _______________ of great importance to science.