[ a, an, the, Zero Article ]
Mandela was imprisoned for ___ nearly 30 years for his anti-apartheid activities.
a. a
b. an
c. the
d. X [Nothing]

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Grammar › ViewJanet ___ about her current relationship. Really, every time I see her.
A. always talks
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We ______________ at a lovely cafe on our way home.
A. did stop
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Grammar › ViewThe teacher _____ give homework on weekends.
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We didn’t recognize the man because he _____ sunglasses.
A. has worn
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C. was wearing