To learn English well, we should find opportunities to hear English______ as much as we can.

(2011·浙江卷)I’ve been writing this report________for the last two weeks，but it has to be handed in tomorrow.

—How soon will the candidates get their university admissions?—It may take three weeks for all the applications to be ________.

.He, out of breath ,_____ himself along the street. Perhaps he was badly ill.

I called the airline to ______ my flight reservation a week before I left for Canada.