show me your passports please

Question

A:Show me your passport,please.B:Oh,it’s not in my pocket.It must have ______.
A.fallen off B.fallen out C.fallen down D.fallen over
必须有解析

Answer 1

fall off
减少；跌落；变坏；变瘦
fall out
争吵；结果；解散； 掉队；掉出来
fall down
倒塌,跌倒；失败；趴架；栽倒
fall over
被…绊倒；意外地从…上跌落；落在…之外；迫不及待做某事
此题个选项时态一致,考的是词义辨析
选B