Our lab is on the third _____ of a six—______ building.
More and more people have got to know the importance of the English study. ______, about six people in ten in this city are able to speak a little English.
It is only ______ you understand what your parents do to you ______ you can improve your relationship with your parents.
---When did you get to know each other ? ----It was in 2008___ we spent summer vocation together.
Many parents have called head teachers to know ______ their children are getting along well with everything in the school.
The US Space Agency sent up a space probe to hit the moon to see ______.