—Will you be _____ this afternoon, John?—It depends. I’m afraid I’ll be called in by my manager.

English has been very popular because it is the _______ language in many western countries.

The book you want is not ___now. I will let you know as soon as it is returned to the library.

Alice laid her baby on the sofa_____ and wrapped it with a blanket.

The young violinist is very excited because the concert given by him has never been _____.