——_____was the Nanjing-Changjiang Bridge open to traffic?
——It was open to traffic in 1968.
A.What | B.What time | C.How long | D.When |
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——_____was the Nanjing-Changjiang Bridge open to traffic?
——It was open to traffic in 1968.
A.What | B.What time | C.How long | D.When |