菜单命令前的“·”为单选标记,表示控制某种状态的切换,一组选项中只可选中一个。
正确
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Weareallconcerned_______hersafety.
ThefunctionsofinstitutionsofhighereducationintheU.S.are________.
_______isknowntoall,Chinawillbean_______powerfulcountryin20or30years’time.
ThelongestriverinCanadais________.
Decisiononwhetherthemessageisrightorwrongshouldatleastcomeafter_____whatthemessageis.