While he ________ his homework , his mother came in.
#41781
A
does
B
did
C
was doing
D
do
推荐题目
--Tom, do you know there _________ a sports meeting next Thursday? --Sorry, I forgot to tell you.
#40673
A
are going be
B
is going to have
C
will have
D
will be
There ______ great changes in our hometown in the past fifteen years.
#41872
A
has been
B
have been
C
was
D
were
The meeting _________ by the time I got there yesterday.
#40511
A
was on
B
has been on
C
had begun
D
has begun