[ Grammar ]
What is the subject of this sentence:
Hummingbirds beat their wings 60 times a second.
A. Hummingbirds
B. Hummingbirds beat
C. beat their wings

Random Topics:
Conditional SentencesPrepositions and Prepositional PhrasesGrammar and Passive VoiceSimple Present ProgressiveQuantifiers with NounsTOEICPast Continuous Tense & Past ModalsPhrasesSubordinating ConjunctionPunctuationOther quiz:
Tenses › ViewEncik Rahim and his wife always __________ up the hill in the evenings.
A. cycle
B. cycles
C. cycling
D. cycled
Conjunctions › View
Choose the correct variant.
… my mother … my father will be able to spend the party on Sunday.
A. Neither … or
B. Both … or
C. Neither … nor
D. Either … and
E. Either … nor
Compound Sentences › ViewDo you want to try these shorts, _____ do you want to try on those blue ones?
A. and
B. but
C. or
Grammar › View
I enjoy reading this new magazine. ___, it has good articles.
A. Moreover
B. Nevertheless
C. However
