Theletter________chiefly________exp

发布时间:2020-07-09 15:08:09

The letter ________ chiefly ________ export modities.













A.is; referred to












B.take; notice of











C.has; effect on











D.is; concerned with

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D解析句意为“这封信主要是关于出口商品的”,be concerned with“与……有关”。
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