Younger children are curious ________ how things work ，and many of them want to take apart everything within their reach.
A、ofB
译文：小孩子对事物是如何组成的很好奇，一些孩子总是想把他们够得到的东西都拆开。此题考查短语搭配，becuriousabout对…好奇。
Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
Thereisagrowingbodyofevidencetosupportthefactthatmostpeoplesufferfromalackofdaydreaming_______anexcessofit.
Thebasicunitinthestudyofmorphologyis______.
Hetalkedalotaboutthingsandpersons________theyrememberedintheschool.
Acompoundisthecombinationofonlytwowords.
