27. We mustn’t risk _______________ late for the concert. I put off going last week, and I don’t want to miss it again. (A) remain (B) got (C) to be (D) being

29. Scientists had warned the people in Armero of the dangers of volcano, but most people had forgotten about them. The volcano erupted in 1985 and killed hundreds of people there. If the scientists’ warnings _______________, many lives could have been saved. (A) had not been ignored (B) have not ignored (C) were not ignored (D) have not been ignoring

27. We mustn’t risk _______________ late for the concert. I put off going last week, and I don’t want to miss it again.
(A) remain
(B) got
(C) to be
(D) being

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