The operation room in every hospital has to _______bacteria of any kind so that the patient being operated on doesn’t get infected.
A new bridge ______ across the river and it is expected to open next year.
We appreciate ______ us know the change of the date for the meeting.
This is a picture of Dr. Yuan, a scientist ____ is well known in our country.
Only when I left my parents for Italy ________ how much I loved them.
There was _____ time _______ I hate to go to school.