[ Grammar ]
What is George saying? We ______ .
a. don’t understand
b. aren’t understanding

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Definite and Zero ArticlePre-intermediateTenses and Verb FormsFOR & SINCENouns & PronounsPresent Simple & Present ContinuousSentence Structure and Verb TensesElectricity VocabularyActive and Passive Gerunds and InfinitivesAdverbs and Adverbial PhrasesOther quiz:
Gerunds and Infinitives › ViewThey will stop ………… lunch at twelve.
A. to have
B. having
Vocabulary › View
Which situation best uses the word intractable?
A. A stubborn mule refusing to move
B. A polite customer thanking a waiter
C. A delicious meal being served
D. A mountain climber showing courage
Modals › ViewWhich modal is used to express prohibition?
A. must not
B. can not
C. could not
D. should not
Tenses › View
What time ……. your favorite TV show usually start?
A. was
B. has
C. did
D. does