[ Vocabulary ]
Scientists think that wild animals must ____________ in their natural habitats.
A. keep
B. to keep
C. be keeping
D. be kept
Select your answer:
Random Topics:
Modal Verb in Passive VoicePresent Progressive TenseTravel VocabularyDemonstrative PronounsMixed GrammarAdjectives and DegreesEnglish MorphosyntaxGrammar and UsageComparison and ModalsGrammar Past and Future TenseOther quiz:
Conjunction › ViewShe always carries an extra jacket ……. she doesn’t feel cold
A. so that
B. in order to
C. hope
D. wish
Infinitive and Gerunds › View
What is the Gerund of the sentence:
Carefully painting the fence
A. Painting
B. The fence
C. Carefully