一Is Kitty really hardworking?一Ye s_she keeps ________ dancing every day.
The math problem is ________for him to work out . He isn’t good at math.
________, volunteering is both a chance to help others and a good way to develop ourselves . So you’d better make time to volunteer.
---Hi ,Ann! I won the first prize in the English Speech Contest . ---Congratulations! And I guess your parents must ____you.
How time flies ! We’re leaving school. I’ll never forget the days _____we have spent together.
—Is Mr. Smith really ill ? —________.He’s in hospital.