--- What kind of house do you want to have? Something big?  --- Well, it         be big --- that’s not important. 

I have trouble ________ the new words. 

It_____ have been Tom that parked the car here, as he is the only one with a car.

—Hi, Johnson, any idea where Susan is?—It's class time, so she       in the classroom now.

If you often go to a gallery, it ______ well change forever the way you look at art.