猪弓形虫病时主要引起（）

A.出血性淋巴结炎

B.坏死性淋巴结炎

C.慢性淋巴结炎

D.化脓性淋巴结炎

E.浆液性淋巴结炎

The boy with two dogs _____ in the yard when the earthquake rocked the city．

A．is playing

B．was playing

C．are playing

D．were playing