介词选择填空,有些很相近,应该怎么区别呢?选哪个合适为什么?
介词选择填空,有些很相近,应该怎么区别呢?选哪个合适为什么?
1.we deal in decorative fabrics in/of different varieties.
2.good harvest this year has made it possible for us to supply walnuts at/against last year's pirce.
3.since/because/owing to heavy commitments,we cannot accept any fresh orders.
1.we deal in decorative fabrics in/of different varieties.
2.good harvest this year has made it possible for us to supply walnuts at/against last year's pirce.
3.since/because/owing to heavy commitments,we cannot accept any fresh orders.
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你能帮帮他们吗