. The reason for all the changes being made _______to us yet.
#103486
A
has not explained
B
has not been explained
C
did not explained
D
were not explained
推荐题目
_______ , the girl worked in a hurry.
#103459
A
Having swept the room
B
Another room swept
C
Having another room to sweep
D
Having another room to be swept
Mr. Li is absent today. What do you consider ________ to him?
#102955
A
happens
B
is happened
C
happening
D
has happened