______improve his oral English, he took part in the summer course
There are four bedrooms, ______ with its own bathroom.
Her lecture was hard to follow because she kept jumping from one subject to _____.
These trousers are dirty and wet — I’ll change into my _____.
Some of the students were late for the meeting, but I can’t remember _____.
“Who told you?” “Oh, somebodyorother, I’ve forgotten _____.”