In all his life, Dickens wrote a large number of excellent novels in the 19th century, _____ some are still popular nowadays.
—Tony said he could fix my bicycle, but I really doubt it. —_______. He’s very good at this sort of thing.
This article may be some advice about how to _________ oneself in society.
The environmental problems in China may worsen if __________ unsolved.
_____ cleaning the doghouse was the last thing I wanted to do, I did it with all my efforts.
Constant practice has erased my accent to a point _____ people think I’m a native speaker.