Dunhuang used to be a marketplace _____everybody came and were able to purchase silk, tea, porcelain(瓷器)…
A.which | B.that | C.when | D.where |
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Dunhuang used to be a marketplace _____everybody came and were able to purchase silk, tea, porcelain(瓷器)…
A.which | B.that | C.when | D.where |