--Do you know what caused the accident? --- No, not yet. The matter _____.
#101883
A
is being looked into
B
was being looked into
C
looked into
D
is looked into
推荐题目
Measures have been taken to prevent the accidents, but much _____ for more improvement.
#101771
A
remains to be done
B
is remained to do
C
remains to do
D
is remaining to be done
Mary said they _____________________with each other for six years before they got married.
#100282
A
has fallen in love
B
had fallen in love
C
had been in love
D
has been in love
She will stop showing off if no notice ______ of her.
#100639
A
has taken
B
takes
C
will be taken
D
is taken
—Do you know the most ancient city in China—Xi’an well?—No，this is the first time I ________ here.
#103210
A
came
B
have come
C
am coming
D
come
Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
#102958
A
became
B
had become
C
has become
D
becomes