____may be defined as any kind of engaging with the language on the part of the learners,usually under the teacher supervision,whose primary objective is to consolidate learning.

单选题

____may be defined as any kind of engaging with the language on the part of the learners,usually under the teacher supervision,whose primary objective is to consolidate learning.

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单选题

At which stage of the service lifecycle should the processes necessary to operate a new service be defined? （ ） 。

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填空题

A bridge can be defined（ ）a structure getting over an obstacle,such as a river,a road or railways.as

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