【题目】As Jack left his membership card at home, he wasn't allowedinto the sports club.
A.going
B.to go
C.go
D.gone

【答案】B
【解析】句意：因为杰克把会员卡落在家里了，所以不允许他进体育俱乐部。此处是allow sb to do sth的被动语态形式，即sb is allowed to do sth。选B。