- 问题详情:单句语法填空1.I'mcertainDavid'stoldyouhisbusinesstroubles____________,it'snosecretthatheowesmoney.2.They____________(design)thenewcarforweeks,sotheywantedtohaveagoodrest,andtakeashower.3.A____________(heat)discussionisgoingonintheclassroom.4.T...
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