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
They woke up ______ everything around ______.
#103189
A
found; changed
B
only to find; changed
C
to find; changing
D
finding; changed
—Allan looks tired out. —Sure. He in the gym for two hours.
#102106
A
works out
B
had worked out
C
has been working out
D
was working out
The letters for the boss___________ on his desk but he didn’t read them until 3 days later.
#102130
A
were put
B
was put
C
put
D
has put
I had hoped to see her off at the station, but I _____ too busy.
#103703
A
was
B
had been
C
would be
D
would have been
—Andy works hard．—So he does．He is often seen _____ heavily before his teammates have even arrived at practice．
#102460
A
to be sweated
B
sweated
C
be sweated
D
sweating