Tony is busy _______ his homework.
#50470
A
doing
B
do
C
to do
D
does
推荐题目
I prefer ____________ shopping to ____________ at home.
#49532
A
to go; staying
B
going; stay
C
going; staying
D
go; to stay
Neil Armstrong is the first man .
#48796
A
walk on the moon
B
walk on moon
C
to walk on the moon
D
to walk on moon