-- _____is that used for?---_____ the floor.
-- Who do you think _____ such a foolish thing?-- It _____ Tom, but I’m not sure.
-- Mr Jordan, we want to hear your opinion about the current NBA games.-- OK, I ____ to that.
The firemen _______ some nearby houses to stop the fire spreading.
______ the fact that the old cars could not go as fast as modern ones, people still watched the race with a great deal of pleasure and excitement.
The university estimates that living expenses for international students ______ around $8,450 a year, which ____ a burden for some of them.A are;are B. is;are C. is;is D. are;is