---- There is a lot of smoke coming out of the teaching-building there.---- Really? It _____ be a fire, most probably.
You can never imagine what great ________ we had _______ your school last time.
— _______ — I said you’d better go by bus.
I ______ for London tonight, for there is ______ an important meeting there.
----I _____this morning, but he could not come. ----Well, we’d better go and _____at his office.
_____ from heart trouble for years, Professor White has to take some medicine with him wherever he goes.