When did they start building that hospital? A. How long have they built that hospital?
B. How long have they started building that hospital?
C. When have they built that hospital? D. When have they started to build that hospital?

Question

cobexinhdep · Answer

When + did + S + V (qkđ) (+ O)? => How long + have/ has + S + V(htht) (+ O)?   => Chọn A

When did they start building that hospital? A. How long have they built that hospital? B. How long have they started building that hospital? C. When h

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