The Diaoyu Islands _____ in Chinese maps since the 14th and 15th centuries.
#100503
A
have been included
B
had been included
C
were included
D
are included
推荐题目
The teacher is not easy-going,and he never ____in the pupils’ games.
#104911
A
took part
B
joined
C
participates
D
succeeds
A local radio station said that several eruptions _____ in the past twenty years.
#101916
A
had been taken place
B
took place
C
have taken place
D
had taken place
He______ and was made to repeat it. 
#104327
A
didn'tunderstand
B
didn'tbeunderstood
C
wasn'tunderstand
D
wasn'tunderstood