What’s wrong with you, MrKeller? — I’ve had a very bad headache for two daysAt first, I ______ I caught a cold, but the medicine ______

_________ he ________ to wear glasses when he went to school

Alice didn’t go to the park _____ her illness.

She is the only one of the students _______ able to answer this question.

Both teachers and students _____not to use mobile phones in class in our school.