Childrenhaveanatural________abouttheworldaroundthem.
A、certaintyD
孩子们对他们周围的事物有着天然的好奇心。考查名词词义选择题。 A 确定性， 肯定的事 B 能力，才能 C 精明，聪颖 D 好奇心，求知欲
Ifpaymentisnotreceived,legalactionwillbeouronly________.
Hetalkedalotaboutthingsandpersons________theyrememberedintheschool.
Lyingundertheskull,thehumanbraincontainsanaverageoftenbillionnervecellscalled______.
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
Acompoundisthecombinationofonlytwowords.
