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WHEN I CAME, AN EXPERIMENT ______ IN THE LAB
WHEN I CAME, AN EXPERIMENT ______ IN THE LAB
Unit 1: HOME LIFE
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Đáp án tham khảo
75.
When I came, an experiment ______ in the lab.
A. was being holding B. has been held C. was being held D. has held
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75.
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Unit 1: HOME LIFE