霍乱的病程分期包括（）
A.极期
B.缓解期
C.恢复及反应期
D.脱水虚脱期
E.泻吐期
参考答案：C, D, E
Is it only recently ___ he has had a family himself?
A．when
B．if
C．that
D．which
Elizabeth has already achieved success________her wildest dreams. [ ]
A. at
B. beyond
C. within
D. upon
