I must study hard ________ I won't fall behind others.A.in order to notB.so as not toC.in order not toD.in order that
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D解析考查固定短语。in order (not) to do sth, so as (not) to do ath表示“以便于 (不) 做某事”，常在句中作目的状语，但前者可放在句首或句中，后者只能放在句中。in order that或so that后引导目的状语从句，但前者可以放在句首，而后者不可以。由题中I won't fall behind others可知是引导的目的状语从句。故D项正确。