--- I hear that Hu Jintao will come to Nantong because the Sutong Bridge is open to traffic soon.
--- Do you know _______?

--- I hear that Hu Jintao will come to Nantong because the Sutong Bridge is open to traffic soon.

--- Do you know _______?

A. what will he talk about    B. where will he give a talk

C. how will he come        D. when he will arrive

--- I hear that Hu Jintao will come to Nantong because the Sutong Bridge is open to traffic soon.

--- Do you know _______?

A. what will he talk about    B. where will he give a talk

C. how will he come        D. when he will arrive

---I don’t know when      tomorrow.
---I will call you as soon as he      .
A. will he come; arrives       B. he will come; arrives
C. he will come; will arrive    B. will he come; will come

—I don’t know when ______ tomorrow.—I will call you as soon as he ______.