_____ your timely advice,I would never have known how to go about the work.
A、UnlessB
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Thebackgardenofourhousecontainsalawn,()verypleasanttositoninsummer.
_____nocauseforalarm,theoldmanwentbacktohisroom.
John'sscoreonthetestisthehighestintheclass;he____lastnight.
You____thatlettertoJames.However,youdidn't.
Itisimperativethatstudents_____theirtermpapersontime.