If payment is not received, legal action will be our only ________.
A、aggressionC
A挑衅、侵犯B优势、优点C选择、取舍D野心、抱负
_______isafactthatEnglishisbeingacceptedasaninternationallanguage.
Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.
Countrylifeisbetterthancitylife________itoffersfreshairandnoiselessenvironment
Alinguistictheoryisconstructedaboutwhat______isandhowitworks.
Thebasicunitinthestudyofmorphologyis______.
