— We're leaving for Dalian for a holiday tomorrow morning.      

— ______. Do remember to give me a call when you get there.  [ ]

A. Congratulations

B. Nice to hear that

C. Well done

D. Have a good journey

—Did you catch what the teacher said?

—No. She spoke so fast _______ I couldn't hear her very clearly.[ ]

A. which

B. that

C. when

D. since