Tom tried his best to keep awake, but the performance was so boring that he couldn’t help to sleep.

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问题 Tom tried his best to keep awake, but the performance was so boring that he couldn’t help to sleep.

选项 A、dropping off
B、dropping down
C、dropping away
D、dropping out

答案A

解析 drop off可以有“打盹，打瞌睡”的意思，drop off to sleep则是“睡着”的意思，符合本题的题意。其他三个选项分别是：drop down意为“(使)落下，迅速低下身体等”； drop away意为“陆续离开，逐渐减少等”；drop out意为“退出，退学等”，均不符合本题的题意。

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专业英语四级

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Tom tried his best to keep awake, but the performance was so boring that he couldn’t help to sleep.

专业英语四级

Usually,therearetworeasonstopursuescientificknowledge:forthesakeoftheknowledgeitself,andforthepracticalus

Usually,therearetworeasonstopursuescientificknowledge:forthesakeoftheknowledgeitself,andforthepracticalus

Aspeopleage,thebrainchangesinbothgoodwaysandbad. Ifyouareover20,yourcognitiveperformanceisprobablyalrea

Peoplewereafraidtoleavetheirhouse,______thepolicehadbeenorderedtostandbyincaseofemergency,theywerejustasc

Howlonghastheprotestlastedaccordingtothenews?

______emergencywhenyouareinalift,youcanmakeaphonecallforhelp.

Hisremarkswere_______annoyeverybodyatthemeeting.

AretheArtsDangerous?Artsinspire,butmayprovoke.Theythrill,butsometimesoffend.Andoftenthesameartworkattrac

Whichtwostateshavedeclaredstatesofemergency?

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