He is busy.He keeps ____ these days. A work B to work C works D working 要理由.

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He is busy.He keeps ____ these days. A work B to work C works D working 要理由.
x)HU,VH*-2SS @$#8U!%XOQ<([I$rS .`:3/]ŲڞO٨gTO c lh^0tf=R_\UҿYKOvO{z/|kK}-Ox}铽s/.H̳1ƞ

He is busy.He keeps ____ these days. A work B to work C works D working 要理由.
He is busy.He keeps ____ these days. A work B to work C works D working 要理由.

He is busy.He keeps ____ these days. A work B to work C works D working 要理由.
D
固定短语:keep doing sth
句意是:他很忙.这些日子他一直在工作.