There were a lot of people standing at the door and the small girl couldn’t get ________．
A.betweenB.throughC.acrossD.beyond在线课程B
解析：
between两者之间；
through穿过；
across横穿(一般不离开地面)；
beyond在……那边。根据句意B项为最佳答案。句意为：有许多人站在门口，小女孩简直过不去。