In order to prevent the fire spreading, some of the houses nearby had been ________ before firemen arrived.
—Does David often come to school ____ bus? —Yes, but sometimes he comes ____ his father’s car.
—Would you _____ a game of table tennis, Cathy? —I’d love to, but I still have piles of homework to do.
—The thread of my kite broke and it flew away. —I told you it would easily break _____ it was the weakest.
—Is there a basketball match between the Lakers and the Huston Rockets this evening? —There _____ be. I’ll phone the gym and find it out.
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.