[ Grammar ]
What kind of participle adds -ing to the first principal part?
A. Present participle
B. Past participle
C. Perfect participle
D. Progressive passive participle

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Modal Verb › ViewI …………. go out tonight. I’m too busy.
A. can
B. can’t
C. might
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I did not go to the show____ I had already seen it.
A. until
B. because
C. so
D. but
Grammar › ViewThe students … bring animals to school.
A. mustn’t
B. don’t have to
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Choose the correct sentence
A. Four percent of the population is wealthy.
B. 4% of the population is wealthy.
