You can’t complain about being left out ______youdon’t make any effort to share your joys and sorrows with others.

His grandfather __________ for thirty years.

While my mother________ some washing, I wasmaking a kite for Mary.

Would you like tea or coffee?—I don’t mind—_________ you’re making.

Only a small number of students able to pass the exam.—Yes．The number of the students no more than 20.