--Excuse me. Is this the right way to the Summer Palace?

--Sorry, I'm not sure. But it ________ be.

[　　]

--Excuse me. Is this the right way to the Summer Palace?

--Sorry, I'm not sure. But it ________ be.

[　　]

---Excuse me．Is this the right way to the Summer Palace?

---Sorry,I'm not sure．But it ______ be．

1. A.
   might
2. B.
   will
3. C.
   must
4. D.
   can

—Excuse me．Is this the right way to the Summer Palace?

—Sorry, I’m not sure．But it _______ be．

A．might　　 B．will　　　　　 C．must　　　　　 D．can