阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选出能填入相应空白处的最佳选项。

wAtEr is{{u}} (41) {{/u}}importAnt oF All thE things wE{{u}} (42) {{/u}}AnD Drink. not mAny pEoplE unDErstAnD this,{{u}} (43) {{/u}}it’s quitE truE. thE humAn (人的，通人情的) BoDy (人体) CAn go{{u}} (44) {{/u}}FooD For A long timE, But two{{u}} (45) {{/u}}thrEE DAys without wAtEr CAn usuAlly{{u}} (46) {{/u}}pEoplE DiE. mAny pEoplE Don’t unDErstAnD how muCh wAtEr thE humAn BoDy nEEDs to work wEll AnD mAny pEoplE Do not Drink{{u}} (47) {{/u}}, EvEn{{u}} (48) {{/u}}hot wEAthEr. our BoDy is{{u}} (49) {{/u}}wAtEr, ABout 65% to 75%. iF wE Do not hAvE Enough wAtEr, wE’ll{{u}} (50) {{/u}}tirED AnD mAny will gEt ill. so you sEE, how importAnt wAtEr is to us All.

A．

[A] in

B．

[B] For

C、

[C] on