The Dongying-Hainan airline         for about 5 months. I have taken the flights three times.
#38883
A
is open
B
has opened
C
has been open
D
has been opened
推荐题目
- What do you think of this film? - Great! I_______ such a wonderful film before.
#37279
A
don't see
B
won't see
C
have never seen
D
have already seen
Sally took a photo of her friends while they _________ computer games.
#39111
A
play
B
are playing
C
have played
D
were playing
—Excuse me, Mum. When can we have dinner? —Not until it   in half an hour.
#36824
A
is prepared
B
has been prepared
C
will be prepared
D
was prepared