_____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.
He spent at least as much time reading as you _______on line yesterday.
In front of the house _____ with a history of 100 years.
I’m really a bit worried because I have no idea what my parents’ _________ will be to my poor examination result.
Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power.
All the task ______ ahead of time, they decided to go on holiday for a week.