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
It is the first time that Michel _______ the Summer Palace.
#99257
A
is visiting
B
visits
C
has visited
D
will visit
—Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here.
#101422
A
have been caught
B
have caught
C
had caught
D
was caught
30. – Why does the boss look worded?– Tom left the company a month ago and his work unfinished ever since.
#103900
A
has been left
B
was left
C
left
D
is leaving
I had meant to meet you at the airport this morning, but I was too busy for I_______ a report.
#100705
A
wrote
B
have written
C
was writing
D
had written