1 there aren't two reference books on the selves. Are there two reference books on the selves ?2 there isn't a lot of discussion about language learning now. Is there a lot of discussion about language learning now?3 there isn't a set of grammar exercise in this text book. Is there a set of grammar exercise in this text book?4 there aren't some courses for beginnings at the University. Are theresome courses for beginners at the University? 5 there aren't some booklets here. Are there some booklets here?6 there isn't some sense in what he proposes. 7s there some sense in what he proposes?