不属于胃镜检查的并发症是（）

A.下颌关节脱位

B.食管或胃穿孔

C.腮腺肿大

D.心动过速

E.心搏骤停

He was a stranger in this town, so the local people didn’t know _______.

A．how could they make friends with him

B．how they could make friends with him

C．how can they make friends with him

D．how they can make friends with him