The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane______ normally. 
#102293
A
will function
B
functioned
C
is functioning
D
has functioned
推荐题目
—Call me at 5: 30 tomorrow morning. —Why that early? I _____ then.
#103153
A
will sleep
B
was sleeping
C
will be sleeping
D
have been sleeping
Her forehead _____ hot. I’m afraid she is ill.
#103728
A
is feeling
B
felt
C
is felt
D
feels
The girl told me that she ___ beaten and she ___telephone the police. 
#101856
A
was; would
B
has been; will
C
had been; would
D
had been; will