Before the flight takes off, all passengers(ask)______ to fasten their seat belt

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问题 Before the flight takes off, all passengers(ask)______ to fasten their seat belts.

选项

答案 are asked

解析本题考查的是谓语动词的时态。时间状语从句用before引导，而且从句谓语动词用了一般现在时，故主语不能用过去时态，而应用现在时态。在主句中用一般现在时，通常指现阶段已经计划好或安排好的情况。故可先确定ask用一般现在时。再看主语passengers与谓语ask之间的逻辑关系，应为被动关系。因此填areasked。

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Before the flight takes off, all passengers(ask)______ to fasten their seat belt

TheA380willcarryas______(much)as800passengers—morethandoublethecapa

Thepainterdiedbeforehehadachancetofinishthework,sothepaintingrema

BeforeIarrivedhomeintheevening,mymother(get)______thesupperready.h

Someofthemeatsmeltbadbeforereachingthemarketand______away.A、couldbe

[originaltext]M:Hi!Ithinkwe’vemetbefore.It’sgoodtoseeyouagain!W:H

Neverbeforethatnight______theextentofmyownpower.A、hadIfeltB、Ifelt

Withoutreadingtherequiredbooksbeforeclasses,studentswillfinditdifficu

Hetalked______hehadnevermetmebefore,whichmademequiteembarrassed.A、a

Beforeeveryconcert,sheworriesabouthowwellshewill(performance)______.per

He(work)______inthatcityforeightyearsbeforehemovedhere.hadbeenworking

—HowmanyforeignerscometoChinaeveryyear?—It’shardtosay.______people

•Youwillheararadiointerviewbetweenaneconomistandajournalist．•

Thesearethequestionsyoumightbeinterestedin.First,【B1】______.If

Weshouldputourdisputesasidebeforethecommitteeandabide______itsdecisio

错

卷材防水层的基层与突出屋面结构的交接处，以及基层的转角处，找平层均应做成圆弧形，

图E-11中通电导体在磁场中向下运动，标出电源的正、负极，以及磁铁的N、S极。

数据中心的组成应根据系统运行特点及设备具体要求确定，宜由主机房、辅助区、支持区、

2013年8月3日，同德公司取得一块土地的建设用地使用权，并在该土地上合法建造了

在进行单位工程验收时，涉及安全和使用功能的分部工程不仅要全面检查其检验资料的完整