【題目】Among the biggest problems facing those remote mountainous villages __________the lack of experienced teachers.
A.is
B.are
C.is there
D.are there

【答案】A
【解析】句意：這些偏遠山區(qū)村莊面臨的最大問題之一是有經(jīng)驗老師的缺乏。此句是完全倒裝，the lack是句子的主語，一般現(xiàn)在時態(tài)，所以答案是A。

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