If I were rich, I should help them out. _________,I can do nothing.
The teacher told the pupils that the United States of America _____ 50 states.
— Shall I turn on the TV, Mom? —No. You should be quiet _____ wake up your sleeping brother.
I didn’t go to the party, but I do wish I ____there.
The professor gave orders that the test ____before 5:30.
Three college students were accused _____ causing the accident on purpose and sentenced to three years in prison.