______ until the lights have turned to green. 
#66190
A
Wait
B
To wait
C
Waiting
D
Having waited
推荐题目
_________useful advice it is ?
#66061
A
What a
B
How a
C
What
D
How
______ some housework can make your mother_______.
#59454
A
Doing; happy
B
Making ; happy
C
Doing; happily
D
Making ; happily
  ________ it is to have a swim in a pool on a hot summer.
#65877
A
How fun
B
How funny
C
What fun
D
What funny
Why stand there watching — _____ and help us!
#66184
A
come
B
coming
C
to come
D
to be coming