-Do you know the great changes happening in the village?-No, it's the first time I __________ here.
I failed again in the exam and only then _____ how much time I had wasted.
—Mom. May I play computer games just for a while?—______ ! Dad is writing his paper.
—Does Shelly like shopping?—Well, she would rather spend time ______ at home than _______ in the street.
If you think there _____ huge quantities of oil for the use of drivers, you are wrong.
The chairman thought ______ necessary to invite Professor Smith to speak at the meeting.