.I’m sorry, but I had no alternative. I simply ______ what I did.a. must do b. had to do c. ought to have done d. have to do
____ the expense, I ____ a round-the-world tour.
____ you dislike ancient buildings, Warrick Castle is worth a visit.
It was dark and cold. They had to find a house ____ and some wood ____.
The house built of stone lasts longer than ____ built of wood.
It is ______ that terrorism is a great threat to world peace.