--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 on time as planned.
A.that | B.when | C.what | D.whether |
推荐套卷
--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 on time as planned.
A.that | B.when | C.what | D.whether |