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Generally speaking,______ according to the directions,the drug has no side effect.

A.when taking                                  B.when taken

C.when to take                                  D.when to be taken

33. Generally speaking, ______ according to the directions, the drug has no side effect.

   A. when taking    B. when taken         C. when to take      D. when to be taken

Generally speaking, ______ according to the directions, the drug has no side effect.

   A. when taking    B. when taken         C. when to take      D. when to be taken

Generally speaking, ____according to the directions, the drug has no side effect.

  A. when taking  B. when taken  C. when to take  D. when to be taken.

Generally speaking,      according to the directions,the drug has no side effect.

A.when taking                   B.when taken

C.when to take                  D.when to be taken