[ Verb Tenses ]
How long _____ online videos about solar power?
A. are you watching
B. do you watch
C. have you been watching
D. have you watched
Random Topics:
TAG QuestionsLinking Words & PhrasesGrammar and ReadingComparativePast Perfect TenseModals AuxiliaryZero Conditional SentenceActive and PassivePresent & Past TensesVerbal and Appositive PhrasesOther quiz:
Grammar › ViewMy grandfather was born ___ Oct.10th，1935.
A. on
B. in
C. at
D. of
Vocabulary › View
What is the inner layer of the Sun’s atompshere, located above the photosphere and below the corona?
A. Corona
B. Photosphere
C. Chromosphere
D. Blazar
Lucy ….. coffe yesterday morning.
A. Drinking
B. Drank
C. Drink
D. Drinks
Prepositions › View
She apologized …..not saying good-bye.
A. Of
B. Because
C. For