—Which flight ________ ? —I want to catch the 13:00. 
#104768
A
you are to catch
B
are you catching
C
do you catch
D
have you caught
推荐题目
She stared at the painting,wonder where she ____it.
#103779
A
saw
B
has seen
C
sees
D
had seen
— Flight MU257 ______, I must be off now.— Have a nice trip.
#102791
A
is being announced
B
has announced
C
was announcing
D
had been announced.