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When she came out, Mary looked a bit tired because she _____the house.

A. cleaned  B. was  C. had cleaned  D.had been cleaning

.When she came out, Mary looked a bit tired because she _____the house.

A. cleaned          B. was           C. had cleaned        D.had been cleaning

When she came out, Mary looked a bit tired because she ____ the house.

  A. cleaned                 B. was cleaning             C. had cleaned                     D. had been cleaning

When she came out, Mary looked a bit tired because she     the house.

A. cleaned   B. was cleaning    C. had cleaned      D. had been cleaning

.When she came out, Mary looked a bit tired because she _____the house.