— 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
Fish ________ without (没有)water .
#42450
A
dies
B
is dying
C
won’t die
D
will die
Tom      Kate since two years ago, and they have had a child.
#37444
A
got married with
B
married to
C
has been married to
D
married
The meeting _________ by the time I got there yesterday.
#40511
A
was on
B
has been on
C
had begun
D
has begun