[ Past Tense and Past Continuous ]
Susie (watch) a film when she (hear) the noise.
A. Susie was watching a film when she heard the noise.
B. Susie watched a film when she was hearing the noise.
C. Susie was watching a film when she was hearing the noise.
D. Susie watched a film when she heard the noise.

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With these new tools retailers ________________.
A. profits will increase
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