people have always been curious ______ how living things on the earth exactly began.
_______ in the storybook that he had bought not long before, the boy didn’t notice his mother go into his room.
Tina has been working so hard at English that she _______the find English exam.
Mary’s parents objected to _______ John, who was poor and lazy.
Mary felt herself _______to take action to defend herself.
If you _______ with your classmates, you will surely get the same work done far better.