— I don’t remember having ever seen John since last week.Has he gone somewhere?— Not really.He_______ his newly-bought apartment.
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?