In the sentence, certain words are in bold and numbered from A to E, which are the possible pairs to be interchanged. Choose the pair(s) of words which need to be interchanged to make the sentence grammatically correct and meaningful. 

It is a time to (A) blow the dust off those books and read, to make those calls which you have been (B) deferring, to practice a hand at cooking, to make paper planes and to (C) postponed those (D) innumerable things that you (E) pursue because you felt you never had the time.