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Sentence Pattern 5 (It+be+adj+to-inf)
By: t1703, Views: 1467
Sentence Pattern 5 (It+be+adj+to-inf): It is difficult to solve this problem.
Chemistry tutorial-Ch46-5-Condensation polymerization
By: t0605, Views: 1058
Chemistry tutorial-Ch46-5-Condensation polymerization
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