通读下面的短文，掌握其大意。然后从每小题的四个选择项中选出可填入相应空白处的最佳选项。

lEt mE tEll you A story ABoutBErB AnD milDCArBriDgE, who usED to BE vEry{{u}} (21) {{/u}}For ExAmplE, milD woulD ForgEt to{{u}} (22) {{/u}}DinnEr, orBErB woulD{{u}} (23) {{/u}}up For work on sunDAy{{u}} (24) {{/u}}it wAs monDAy. onE summEr thEy{{u}} (25) {{/u}}to tAkE A long plAnE trip. whAt Do you guEss hAppEnED wEll, thEy got to thE Airport with only tEn minutEs to{{u}} (26) {{/u}}. so timE wAs short. in thAt{{u}} (27) {{/u}}AnyonE woulD{{u}} (28) {{/u}}thE plAnE right AwAy.But not mr. AnD mrs.CArBriDgE. thEy just hAD to Buy somE Flight insurAnCE(保险){{u}} (29) {{/u}}.All in All, who knows whAt will hAppEn on A plAnE Flight thEy quiCkly put somE{{u}} (30) {{/u}}into A mAChinE AnD{{u}} (31) {{/u}}CAmE thEir insurAnCE poliCy. "who{{u}} (32) {{/u}}gEt thE monEy iF wE{{u}} (33) {{/u}}, i wonDEr " AskED milD、"my mothEr, oF CoursE," hEr husBAnD{{u}} (34) {{/u}}. "wE’ll mAil thE{{u}} (35) {{/u}}to hEr. now quiCk givE mE A stAmp,{{u}} (36) {{/u}}you " hE sAiD、"thE plAnE’s going to{{u}} (37) {{/u}}in AnothEr minutE."BErB put thE stAmp on thE EnvElopE,{{u}} (38) {{/u}}it in thE mAilBox, AnD{{u}} (39) {{/u}}BEgAn to Cry. whAt hAppEnED, Do you guEss hE hAD mAilED thEir{{u}} (40) {{/u}}to his mothEr!

A．thinking
B．BECAusE
C．EvEn though
D．until