—I called you last night, but nobody answered.

—I _____ dinner with my family in the restaurant. [ ]

A. have

B. had

C. have had

D. was having

一艘轮船的排水量是10000t，它满载货物时的总质量是_________t，该船满载货物时受到水的浮力是_________N。若该船从大海驶入内河，船的重力大小_________（选填“变大”、“变小”或“不变”，下同），受到的浮力大小_________，由于河水密度比海水密度小，所以它排开水的体积_________，因此轮船要_________（选填“上浮一些”或“下沉一些”）。（g取10N/kg）