My mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it. 
#99234
A
will do
B
is doing
C
does
D
had done
推荐题目
The box ______ a lot of coins, ______ an old Chinese one.
#101099
A
is containing; including
B
contains; includes
C
is containing; included
D
contains; including