Finally, the young explorer, through a series of lucky accidents, arrived ______ was so-called the valley of death by the locals.
---Believe it or not, I have met him before. ---No kidding? ______ you’ve never mentioned it?
It is our duty to try to ______ production and reduce the number of things we make and buy.
Our factory has been developing rapidly this year. This year’s production is five times _____ it was ten years ago.
We should produce less things from raw materials, _____ is growing smaller and smaller.
As fuel prices rose, bus companies raised their fares and _____.