Sofia looked around at all the faces: she had the impression that she most of the guests before.
We were about to leave the classroom _____ it began to rain.
Three students in ten will go and _____ to stay in the classroom.
The beef is too expensive. I won’t buy it _____.
The medicine _____ natural plants.
----- I’m going to the States. ----- How long ______ you ______ in the States?