用所给单词的适当形式填空。
Robert had a comfortable childhood, ______ up in a pleasant house with a view of the sea.
如图，在底面为平行四边形的四棱锥P﹣ABCD中，AB⊥AC，PA⊥平面ABCD，且PA=AB，点E是PD的中点．
（Ⅰ）求证：AC⊥PB；
（Ⅱ）求证：PB∥平面AEC．
Bob: What do you usually____ (do) on Sunday, Ann?
Ann: I usually____(go) to the library with my sister, Betty. But sometimes my grandfather____(go) with me. He____(like) reading very much.
