哪种疾病用青霉素治疗可引起赫氏反应（）。
A.流行性脑脊髓膜炎
B.草绿色链球菌心内膜炎
C.大叶性肺炎
D.气性坏疽
E.梅毒
参考答案：E
I walked up to the top of the hill with my friends, ________we enjoyed a splendid view of the lake.[ ]
A. which
B. where
C. who
D. that
People wandering in the fairground or park area（）wear a uniform.
A.must
B.mustn‘t
C.have to
D.don‘t have to
