______ pay too much attention to your reading skill, as it is so important.

Jenny goes to school on foot．Ittakes her about half ____ hour to get there． A．an

Some of you may have finished Unit One. ________， you can go on to Unit Two.[ ]

My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment.

Those are my twin sisters. _______ of them are interested in soap operas.