All the students are ________ the desks writing a composition.
A.onB.nearC.againstD.at在线课程D
考查介词at与一些名词搭配的固定含义.at可以表示从事或状态,常翻译为“正在;在……状态中”,如at play, at work, at lunch, at war, at one's best, at rest, at sea等,本题中的at the desks从字面上是“在课桌旁”,但可以翻译为“在学习;在做功课”,表示特定的含义.
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