继发性痛经伴月经失调患者常发于()
A.卵巢囊肿
B.子宫肌瘤
C.子宫内膜异位症
D.多囊卵巢综合征
E.功血
参考答案：C
—Why were you so late this morning?
—I _____ in heavy traffic for an hour on the way here.
A．have been caught
B．have caught
C．had caught
D．was caught
