If payment is not received, legal action will be our only ________.
C
A挑衅、侵犯B优势、优点C选择、取舍D野心、抱负
______ofasentencedependsonthecontextinwhichthesentenceisuttered.
This is an important problem _______ too few social scientists have researched.
_______ is a fact that English is being accepted as an international language.
Thereisagrowingbodyofevidencetosupportthefactthatmostpeoplesufferfromalackofdaydreaming_______anexcessofit.