23.—It’s reported that the new underground line has been completed.
—Yes but it hasn’t been made clear________it’s to be opened to traffic.
A.that | B.who | C.what | D.When |
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23.—It’s reported that the new underground line has been completed.
—Yes but it hasn’t been made clear________it’s to be opened to traffic.
A.that | B.who | C.what | D.When |