题目

阅读理解Dear Sally,Please take these things to your brother Bob: his dictionary, pen, notebook, keys, and baseball. The dictionary is on the bed. The pen is in the pencil box. I put the pencil box on the sofa. The notebook is on the desk. The keys are in the bookcase. The baseball is under the bed. Thanks!Grandma （1） Sally is Bob's. A . sister B . aunt C . mom D . grandma （2） Where's Bob's dictionary? A . On the bed. B . On the sofa. C . On the desk. D . In the bookcase. （3） The Chinese meaning(汉语意思) of the underlined word put is . A某同学在做“用单摆测重力加速度”实验中，如果测得的g值偏小，可能的原因是（  　　）A. 振幅过小B. 将摆长当成了摆线长和球直径之和k*s*5uC. 实验中误将49次全振动记为50次D. 摆线上端未牢固地系于悬点，振动中出现松动，使摆线长度增加了