Wind motion can be observed in the atmosphere by ______ the trails of meteors passing through it.

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问题 Wind motion can be observed in the atmosphere by ______ the trails of meteors passing through it.

选项 A、to watch
B、watching
C、watched
D、watch

答案B

解析英语中，一般只能用动名词作介词的宾语，如：You were in fault for speaking to your ,son in such a rude manner．你对儿子讲话如此粗鲁是错误的，We are not alone in thinking that the experiment is not successful．并非只有我们认为这项实验是不成功的。

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专业英语四级

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Wind motion can be observed in the atmosphere by ______ the trails of meteors passing through it.

专业英语四级

______ofthedepartment,IwouldliketothankMr.Jonesforhisstimulatinglecture.

______isanemployeeallowedtomakepersonalcallsduringworkinghours.

Sheapologizedfor______toattendthemeeting.

Inthesentence"James,thephilosophyprofessor,hascometoouruniversity",theitalicizedwordisusedasa（n）______.

TheScholasticAptitudeTestisunderintensescrutinytoday,partlybecauseofthreatstoaffirmativeaction,changesinadmiss

ThemandidthefollowingthroughtheInternetthatdayEXCEPT______.

Thissupermarkethasanexcellent______forfairdealing.

Thenewspaperdeliverymanputablankcardinsidetheenvelopebecause______.Ed’sencounterwiththerecyclingteamshowsthat

Thediscussiontopicofthepreviousclassmeetingwas

Moderntheatreaudiencesarelessabletounderstandclassicalplaysthanpreviousgenerationsbecauseofadecliningknowledge

肺心病

中国共产党党内的民主集中制原则通过宪法上升为国家的组织原则是在()

根据吊运物体重量配备起重机设备，其额定起重能力必须()物件的重量并有一定的余量。

境内机构经常项目外汇账户的限额统一采用的核定币种是()。

运动处方是指由指导医师或教练员给参加运动锻炼的人员，按其年龄、性别、心肺或运动器官的功能、运动经历以及健康状况等特点，用处方的形式，规定适当的________和________。

当代中国所提出的教育导向思想是()。

WhichofthefollowingareNOTthefirstpeopletoreceivetheswinefluvaccinations?

Incapitalsocieties,themajormeansofproductioncapitalisprivatelyowned.Theownershipoflargeamountsofcapitalcanbr

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