---You may find the key to the maths problem on page 107 . ---Ah, it’s so simple . I wonder why I of that .
–Where is Mr Smith? I can’t find him anywhere. --He is said _______Australia.
I am decorating my office now. I _______ comfortably in my office at this time tomorrow.
He passed through a difficult period _____ after his marriage broke down.
–How do you like Albert Einstein? --________.
— Are you glad to hear from her? — Of course. ___________, we last met more than thirty years ago.