[ Tenses ]
I _____ the answer to the question.
A. knows
B. knew
C. known
D. knowing

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Grammar Comma UsageEmployment VocabularyModals: Possibility, Necessity, ExpectationNarrative Tensesand, so, but, becauseThe First Conditional (if/unless)Grammar Past and Future TenseThe Simple Present TensePrepositions & Modal VerbsComparative and Superlative AdverbsOther quiz:
Modals of Probability › ViewI …………………. watch a programme about animals tonight.
A. might
B. can’t
Vocabulary & Grammar › View
My mother ________ in the supermarket all afternoon.
A. has been working
B. has worked
C. is working
D. works