— 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
When I was walking in the street, I saw a plane___________ over my head.
#42508
A
flies
B
flying
C
flew
D
fly
Don’t worry about your grandmother, All the old people in China now.
#36568
A
are good taken care of
B
are well taken are of
C
take good care of
D
take well care of.
The earthquake ______ when I _______some cleaning.
#39979
A
starts, was doing
B
started, was doing
C
was starting, was doing
D
starts, were doing