It was a small place then compared to _______ it is now.
A、whatA
whatitis是介词to的宾语从句，相当于一个名词。comparedtowhatitisnow：与它现在的样子相比。
Theengineer______myfatherworksisabout50yearsold.
Johnsonwas________unknownbeforerunningforthepresidency.
Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
ThedivisionofEnglishintoOldEnglish,MiddleEnglish,andModernEnglishisnonconventionalandnotarbitrary.
Alinguistictheoryisconstructedaboutwhat______isandhowitworks.
