Only when he arrived home _____ that he had left his key in the office.
#82929
A
will he realize
B
he did realize
C
did he realize
D
should he realize
推荐题目
 ________ the help of her teacher, Mary ________ in the past few months.
#83112
A
With; has made progress
B
Under; has made a progress
C
With; had made progress
D
Under; had made a progress
 To his disappointment, not a single gift _____ on his birthday. 
#80280
A
he received
B
had he received
C
did he receive
D
received he
On the surface of the water________, which spoiled the beautiful scenery of the park.
#81945
A
some dead leaves did float
B
did float some dead leaves
C
floated some dead leaves
D
did some dead leaves float