题目

第二节：完形填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项（A、B、C和D）中，选出最佳选项。 Gus put his paws(爪子) on the window and looked out at the street. His tail began to wag (摇摆) .Mr. and Mrs. Riaz were coming back  36  . They were  37  in something new — a   38  . “   39   , this is Anna,” said Mrs. Riaz. Gus wasn’t   40  if he liked Anna. Mr. and Mrs. Riaz spent a lot of time with   41  . Gus watched while they held the baby. He watched them 用向量证明：梯形两对角线中点连线平行于底边。