—What did the foreigner say? —Oh, he asked where         ?

A．did Jim come from

B．Jim came from

C．Jim comes from

D．does Jim come from

若条件允许，下列情况可用一次法完成根管治疗的是

A．急性根尖周炎患牙

B．再治疗患牙

C．局部肿胀患牙

D．X线片表现为根尖阴影大的患牙

E．根管无感染的牙齿