Since we have a focused subject ，we should not talk ________.
A、atonceD
譯文：既然我們已經有了命題，我們就不應漫無邊際地交談。此題考查對固定短語的掌握情況。atonce立刻;athand在附近，在手頭，即將發生;atintervals間或，不時;atrandom隨便，任意。
Ayearlater，withthenation’seconomy________，Bush’sapprovalratingdroppedbelow40percent
Theoceansdonotsomuchdividetheworld_______uniteit
_______,couldyougetmeaTurkishconversationbook?
________，hehadnotimetorest.
Iunderstoodfromherthatyouundertookotherimportantwork______.
