If the earth stopped moving, everything _____.
A．would disappearB．disappeared
C．will disappearD．disappears
A

試題分析：if的虛擬語氣非常重要，簡要概括如下：1、表示與現(xiàn) 在事實相反的情況，從句：If主語+過去時(Be動詞用were)；主句：主語+should/would/could/might+do：　2、表示與過去事實相反的情況，從句：If主語+had+done；主句：主語+should/would/could/might+have done　3、表示對將來情況的主觀推測，從句：①if+主語+were to do②if+主語+should+do ③if+主語+did（動詞過去式）/were ；主句：主語+should/would/could/might+do；根據(jù)第一句中的stopped，可知本句應(yīng)該是與現(xiàn)在事實相反的虛擬語氣，使用主句中使用would+動詞原形。句義：如果地球停止轉(zhuǎn)動，一切都會消失。故A正確。
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