The research lacks  evidence, and therefore, its conclusions are doubtful.
#19032
A
solid
B
fierce
C
severe
D
potential
推荐题目
He left the place , _____ never ______ back again.
#19170
A
determined ; to come
B
being determined ; to come
C
determined ; coming
D
determining ; coming
It’s said that the old lady died ________.
#20524
A
happily
B
happy
C
happiness
D
of happiness