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After years of service in the Cairo embassy, M. Lapierre has become extremely adept ________ Middle East diplomacy.

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There is no doubt that she can produce work that is equal ________ anyone else’s in her class.

Although he had no criminal record, police are inquiring ________ some of Wilson’s business deals.

A lot of Japanese students of English have difficult ________ the pronunciation of “b”s and “v”s.

采用粘接修复技术之前要考虑哪些因素?

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