--- Did your father come back early last night?
--- Yes. It was not yet eight o’clock _______ he arrived home.
A．before B．when C．that D．until
---How much do you have in your pocket?
---150 yuan, all of _______ came from my grandma.
A．which B．them C．it D．that
On stepping into the room this morning, I was astonished to find the floor covered with _______ looked like tiny insects.
A．that B．what C．where D．when
Walter offered us a lift when he was leaving the office, but our work _______, we refused his offer.
A．not finishing B．had not been finished
C．not having finished D．not finished
---Ann looks hot and dry.
---So _______ you if you had a high fever.
A．do B．are C．will D．would
--- Why on earth didn’t you answer the door?
--- I’m terribly sorry, but the telephone _______, too.
A．is ringing B．was ringing C．rang D．was about to ring
