There _ a small house here 20 years ago.[ ]
A. is
B. are
C. was
D. were
答案：C
积证学病毒性肝炎所致的肝脾肿大，应在辨证论治的基础上选加（）
A.抗病毒
B.护肝降酶
C.抗肿瘤
D.调节免疫
E.抗纤维化
