_____ do you think will teach us maths next term?
The conference has been held to discuss the effects of tourism _________ the wildlife in this area.
It ______ be better if I could earn enough money to buy a private car.
The woman was _______ by the man’s offer of marriage and gave him most of her money.
Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
Of the two speeches, I think the ______ was better.