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。

FirE CAn hElp pEoplE in mAny wAys.But it CAn Also BE vEry hArmFul(有害的). FirE CAn kEEp your housE{{u}} (41) {{/u}},givE light AnD Cook FooD、But FirE CAn Bum things,{{u}} (42) {{/u}}.Big FirE CAn Bum trEEs, housEs, AnimAls or pEoplE. noBoDy knows how pEoplE BEgAn to usE FirE.But thErE ArE{{u}} (43) {{/u}}intErEsting olD storiEs ABout how A mAn or womAn stArtED A FirE. onE is{{u}} (44) {{/u}}A mAn. thE mAn{{u}} (45) {{/u}}A vEry long timE Ago. hE wEnt up thE sun AnD{{u}} (46) {{/u}}FirE Down. toDAy pEoplE know how to mAkE A FirE with mAtChEs (火柴).ChilDrEn somEtimEs likE to plAy with{{u}} (47) {{/u}}.But mAtChEs CAn BE vEry DAngErous. onE mAtCh CAn Burn{{u}} (48) {{/u}}, AnD thAn it CoulD Burn A housE.A、smAll FirE CAn turn into A Big FirE vEry quiCkly. so you{{u}} (49) {{/u}}BE CArEFul with mAtChEs. BE CArEFul with FirE, AnD it will (50) you.But iF you ArEn’t CArEFul with FirE, it mAy hurt you.

A．

[A] wArm

B．

[B] Cool

C、

[C] wArmEr