[ Tenses ]
they are walking on sidewalk
A. verbal sentence
B. nominal sentence

Random Topics:
AdjectivesRelative Clauses and UsagePresent Simple & Present Continuous TensesSecond and Third ConditionalIN, ON & ATModals - Have to or ShouldSentence TransformationVOCAB & GRAMMARVocabulary & GrammarPronunciation and VocabularyOther quiz:
Grammar › ViewGrandma is buying eggs ….
A. to play tennis
B. to keep warm
C. make a cake
D. to make a cake
Grammar › View
Our flight leaves tomorrow at 11pm.
A. Arrangement
B. Timetable/ schedule
C. Intention/ plan