______ you do the experiment carefully, you would make discoveries others wouldn’t make.
We have to write a description of the street ______ we live and give it to the teacher tomorrow.
______ number of our class is fifty-nine and ______ number of students are fond of English.
This is the first time wea film in the cinema together as a family.
Not until he left his hometo know how important the family was for him.
—Did you enjoy yourself last night? —Yes, it’s very nice of you. I appreciatedto the party.