The train stopped ______ at lonely little stations, which resulted in a sleepless night.

As is known to all, the newly learnt words will soon be forgotten unless_____ used in everyday communication.

I’m certain David’s told you his business troubles. _________, it’s no secret that he owes a lot of money to the bank.

His wife is           finding fault with him, which makes him very angry.

We don’t have to keep these old chairs any more. ________, they are falling apart（支离破碎）.