Hi, ( A) When Mei Ling and her mother had arrived at the goldsmith's shop, the salegirl showed varieties of jewellery to them. (b) When Mei Ling and her mother had arrived at the goldsmith's shop, the salegirl showed them varieties of jewellery. Yes, but I suggest this, (A) When Mei Ling and her mother arrived at the goldsmith's shop, the salegirl showed some jewellery to them.
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