Motivation and personality may ________ the varying d egrees of success in one ’s career.
A
A.说明，解释，是……的原因;B请求，申请;C冒风险，担风险;D供应(给)，提供(给)
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.
______ the new plan can be carried out will be discussed at the meeting tomorrow.
Heshookhandswiththevisitors________astoconveyhisapology.
Scientistsdoubtwhetherit’s________toregulateone’sbiologicalclockbydrinking.