It seems that oil______from this pipe for some time.We’ll have to take the machine apart to put it right.
#104361
A
had leaked
B
is leaking
C
leaked
D
has been leaking
推荐题目
The latest unemployment figures will _______ next week
#101128
A
declare
B
be declared
C
be announced
D
broadcast
 It __________ Tom that parked the car here, as he is the only one with a car. 
#101531
A
may be
B
might have been
C
must have been
D
could be
--- I’m sure Andrew will win the first prize in the final. --- I think so. He ____ for months.
#102489
A
is preparing
B
was preparing
C
has been preparing
D
had been preparing