She ________ (work) on this project for several months, and she is still not finished., has been working, I ________ (not feel) well lately, so I decided to see a doctor., have not been feeling, ________ you ________ (wait) here for a long time?, Have been waiting, They ________ (try) to solve the problem all day without success., have been trying, He ________ (constantly complain) about the situation recently., has been constantly complaining, We ________ (look) for a solution, but nothing seems to work so far., have been looking, She ________ (not study) enough recently, which explains her results., has not been studying, How long ________ you ________ (prepare) for this exam?, have been preparing, The company ________ (expand) rapidly over the past few years., has been expanding, Why ________ it ________ (rain) so heavily all day?, has been raining.

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