68 It was at four o'clock in the afternoon ____ he and his grandpa reached the museum in Guanghan.

68 It was at four o'clock in the afternoon ____ he and his grandpa reached the museum in Guanghan.

while            B. that            C. when           D. As

 (    )68. I _______ to bed until my grandma came back home.

          A. didn't go      B. went           C. had gone       D. have gone

 (    )68 .--Would you give me some water,9   --____________

     A. Yes, I would    B. Certainly      C. No, thanks    D. Yes,please.

68 It was at four o'clock in the afternoon ____ he and his grandpa reached the museum in Guanghan.