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THE EXERCISES WHICH WE ARE DOING ______ VERY DIFFI...
THE EXERCISES WHICH WE ARE DOING ______ VERY DIFFICULT.A. IS B. HAS...
BAI TAP TIENG ANH 12 HAY CO DAP AN
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6. The exercises which we are doing ______ very difficult.A. is B. has been C. are D. was
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6.
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BAI TAP TIENG ANH 12 HAY CO DAP AN