Not for a moment ______ that this diseas
题型:选择题
问题:
Not for a moment ______ that this disease was caused by certain virus.
A.he have doubted
B.he doubts
C.did he doubt
D.he did doubt
Not for a moment ______ that this disease was caused by certain virus.
A.he have doubted
B.he doubts
C.did he doubt
D.he did doubt