He was so busy ____ his homework that he forgot to have supper.
#49628
A
to do
B
do
C
doing
D
does
推荐题目
What do you plan ________ tonight?
#49182
A
watching
B
to watch
C
watches
D
watched
Lucy practiced_____ the piano last weekend.
#49905
A
play
B
plays
C
playing
D
played
So many kinds of sweets! I really can’t decide _______. 
#48578
A
what to buy
B
which to buy
C
to buy which
D
to buy what