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41. The children will learn how …………….sums.

              A. to do              B. doing                C. do                       D. will do

 42 . We ……….for the delay in answering your letter.

              A. sorry              B. regret                C. apologize           D. excuse

 43. very few people can ……….my name correctly.

              A. pronoun         B. pronounce         C. announce          D. allow

 44 . The blind ………..unable to see anything.

             A. is                     B. are                     C. am                     D. have

 45 . He said it was right that ……………..should beg.

             A. blind               B. the blinds          C. the blind            D. the blindness