There are forty five students in our class, and they are _____ interested in football

英语字母中，含有A a音的字母有三个，它们是____________.

He decided to study hard_____________ catch up with others.

Some of the members demanded to know why they had been kept____the true facts until they reached the present critical stage

Nobody knew that the reason______ he was often blamed. Perhaps that was______ he made the same mistakes told several times.