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Anyone can borrow books from this library he keeps them clean and returns them i

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Anyone can borrow books from this library he keeps them clean and returns them i

Anyone can borrow books from this library _______ he keeps them clean and returns them in time.

A. even if                 B. unless                  C. so that                          D. as long as

试题答案

D

标签：helibrarykeepscleanthem

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