Tony is busy _______ his homework.
#50470
A
doing
B
do
C
to do
D
does
推荐题目
When you read English books, please translate every word.
#49986
A
do try to
B
try to not
C
not try to
D
try not to
You can’t imagine what difficulty we had________home in the snowstorm.
#50145
A
walked
B
walking
C
to walk
D
walk