When and where this took place _____ still unknown.
#85610
A
is
B
has
C
were
D
are
推荐题目
There ________ lots of changes in our school in the last few years.
#44130
A
has
B
have
C
are
D
have been
Many a student _____ playing games on the playground and only one girl or two _____ reading in the classroom.
#85642
A
are; are
B
is; is
C
are; is
D
is are
Three hours with your girl friend _____to be a short time.
#86127
A
seem
B
seems
C
isseeming
D
hasseemed