Dr. Lamas _________ his speech when the electricity unexpectedly went out for a few monments. a) was deliveringb) deliversc) will deliversd) has delivered Answer : A The public library has requested that all overdue books ________ returned by next week. a) areb) will bec) have beend) be Answer : D ..my mistake.. ago / once / recently / yesterday / this morning / last ~~~ --> the past tenseusuall..