About 15 years ago, scientists did many experiments (develop) _____ the tools to detect new planets.

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问题 About 15 years ago, scientists did many experiments (develop) _____ the tools to detect new planets.

选项

答案to develop

解析本题考查动词不定式。do sth．to do“为了……做某事”。

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本试题收录于：大学英语三级A级题库大学英语三级分类

大学英语三级A级

大学英语三级

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About 15 years ago, scientists did many experiments (develop) _____ the tools to detect new planets.

大学英语三级A级

大学英语三级

Sofar,howmanyvolumesofthebookhavebeenpublished?WhichofthefollowingisNOTMENTIONEDinthepassage?

A、Campjobsareveryattractive.B、Customersathotelsusuallygivetipstowaiters.C、Highschoolkidsusuallyhelptheirparen

Howmuchisthesalepriceforthe180-dollarmen’ssuits?Whatotheritemscanyoufindatlowpricesbesidemen’ssuitsands

A—PurchasecontractB—MarketresearchC—CompetitiveadvantageD—CashflowE—Realprofit

Whydidthefarmersaytothedoctor"HereIamagain"?Becausehewantedtomakethedoctorbelievethathewasnot______.

TheWilliamsburgpackagestresses______.Inordertosavemoney,afamilymaychoosetheWilliamsburgpackagebecause

Youought(report)______theaccidenttothedepartmentmanagerthedaybeforeyesterday.

Whydomoremiddle-agedadultshavetotakecareoftheiragingparents?Becausepeopleareliving______.Whatdoesthespeak

Therapidlyexpandingnumberofautomobilesthreatensafurtherescalationintheemissionofcarbondioxide.

Thefruitnice,butterrible.

袁世凯建立的北洋军阀政权代表的是

A、调牙合安抚B、充填治疗C、安抚后无症状时充填治疗D、活髓切断术治疗E、牙髓治疗牙冠1/2折断，露髓，牙根正常，不松动

海关对企业减免税申请进行审核，属于海关行使()。

个人的自我感受、自尊、自爱、自卑、自信、内疚、优越感、成就感、自我效能感等，属于自我意识的()。

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Arecentreportonpopulationtrendconductedbythethink【1】oftheWorldwatchInstituteidentifiessignsofslowinggrowthin

TomasRodriguez65EconoLane,