阅读下列短文，从所给的四个选项中，选出最佳答案
Anoldmanwaswalkingslowlyalongastreetwhenhesawalittleboytryingtotouchadoorbell.Hestoppedandsaid“I'llringthebellforyou.”Andthenhepulled（拉）thebellsohardthatitcouldbeheardalloverthehouse.
Thelittleboylookedupathimandsaid“Nowwe”llrunawaycomeon.（快跑）Andbeforetheoldmanknewwhatwashappeningtheboyhadrunroundthecornerofthestreetandonlytheoldmanstoodtheretoexplain（解释）totheownerofthehouse.
1．Theoldmanstoppedandrangthebellfortheboybecausehethought
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A．theboywasnottallenoughtoreachthebell.
B．theboycouldn'tpullthebellveryhard.
C．theboycouldn'tmakethebellheardalloverthehouse.
D．theboydidn'tdaretoreachthebellhimself.
2．Theoldmansaid“I'llringthebellforyou.”Thisshows（表明）that
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A．hewaskind.
B．hewaspolite.
C．hewascareful.
D．hewassimple-minded（头脑简单的）.
3．Whatdoyouthinkoftheboy?
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A．Hewasverybright.
B．Hewasverynaughty.
C．Hewasverykind-hearted.
D．Hewasverypolite.
4．Whatdoyouthinktheboydidthisfor?
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A．Tomaketheownerofthehouseangry.
B．Tocalltheownerofthehouse.
C．Toexplaintotheownerwhyhedidso.
D．Todonothingbutnuisance（讨人嫌）.
5．Theoldmandidn'tknowwhatwashappeninguntil________.
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A．
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