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Direction.

In the following questions, in the given sentences, a part of the sentence is underlined. Beneath each sentence, four different ways of phrasing the underlined part are indicated. Choose the best alternative.

He has been working off and on for several years to compile a dictionary.

A. on or off

B. on and off

C. regularly

D. No correction required

Please do not use chat terms. Example: avoid using "grt" instead of "great".