—What a fine day! Shall we go picnicking.

—         . But we need to be home before six o’clock for the football match.

A．Have a nice time

B．Pardon me

C．That’s great

D．You are right

---Nanjing develops so fast. A fourth underground line is being built.

---That’s true. It __________ a lot already.

A. changes    B. changed    C. has changed    B. will change