[ Gerund vs Infinitive ]
In an ancient civilizations people used … danger with smoke
A. signal
B. to signal

Random Topics:
A/AnSecond and Third ConditionalGrammar - Verb FormsConjunctive Adverbs and PunctuationWould/would like - affirmative/negativePrepositions after Verbs and AdjectiveGerunds and InfitinitivesPre-intermediatePreposition (at,in,on)Passive Voice Active VoiceOther quiz:
Subject-Verb Agreement › ViewAccording to the police, the killer of the boys in both cities ___ probably between the ages of 40 and 50.
A. Is
B. Are
All, Both, Neither, None, Either › View
______Paul nor Tom has got any siblings.
A. Neither
B. Either
C. Both
D. None
