She showed the visitors around the museum, the construction _____had taken more than three years.
We are taught that a business letter should be written in a formal style in a personal one.
--- Is this the first time you ___ Xiamen? --- No. But the first time I ____ here, the city wasn’t so beautiful.
_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.
The wounded soldier died _____I had a chance to know his name and family.
They came back from their long walk and went into bed, .