In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
It was __________ back home after the experiment .
She didn’t come to the party last Sunday. __________, she must have made the party more exciting.
— Are you going there with us? — If Mary wants to go, __________.
The teacher told us to remain silent unless _____.
— Do you think it is going to rain over the weekend?— __________.