31. -----What do you suppose made her worried? -----_____________ a gold ring.
She was so angry and spoke so fast that none of us understood _______ he said meant.
“You’ve left the light on.” “Oh, so I have. _____ and turn it off.”
Mr Smith ______ a book about China last year but I don’t know whether he has finished it.
The bridge, which _____ 1688, needs repairing.
“Since you’ve agreed to go, why aren’t you getting ready?” “But I ______ that you would have me start at once.”