.Mr. Richard hasn’t got any time to play golf these days,because he is ______in the research of bird language.
Before we got home, Jim __________ the big cake __________ six pieces.
—Will $2, 000 ________ the cost of the trip?—I'm afraid not. Perhaps I need another $500.
—I don't think I can walk any further.— __________; let's stop here for a rest.
His command was that we __________ immediately.
—Do you mind my opening the window? It's a bit hot here.—__________, as a matter of fact.