The old couple have been married for 40 years and never once _______ with each other.
A、theyhadquarreledC
本题考查的是倒装结构的用法。第二分句中因有否定副词never提前，故应用倒装结构;第一分句中的havebeenmarried已限定了时态，据此可排除D项。
ModernEnglishwordsman,woman,child,eat,fight,etc,originatefrom______.
Johnsonwas________unknownbeforerunningforthepresidency.
Countrylifeisbetterthancitylife________itoffersfreshairandnoiselessenvironment
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.
