18.—Jim, are you ______ this Saturday?—Oh, sorry. I need to go to the bookshop _____ the bank on Saturday.
Ashdown forest, through _______ we’ll be driving, isn’t a forest any longer.
His house, for _______ he paid $10, 000, is now worth $50, 000.
It was not such a good dinner _______ she had promised us.
David is such a good boy _______ all the teachers like him.
______ is mentioned above that the number of the students in senior school is increasing.