— Could you please do some shopping for me, Mary?— Sorry, I ______ my homework.         
#42147
A
do
B
am doing
C
have done
D
was doing
推荐题目
 I__________ Lucy at the bank the other day.
#40180
A
see
B
saw
C
was seen
D
seeing
I’m sorry you’ve missed the train. It _______ 10 minutes ago.
#41855
A
has left
B
had left
C
left
D
has been away
What is your mother doing?---She ___ for oranges.
#41843
A
is shopping
B
is buying
C
buys
D
shops
Great changes        in our city last year.
#40449
A
happen
B
happened
C
take place
D
took place