Every possible means_____ been tried，and we find only______ this means can we do it well．
#86084
A
have，in
B
have，by
C
has，in
D
has，by
推荐题目
Setting fire to the public buildings ___ highly dangerous and forbidden by law.
#86170
A
are
B
is
C
has
D
were
—Is this your family?—Yes, it is. These are my parents and those _____ my brothers.
#43763
A
are
B
am
C
be
D
is
The boy, rather than his friends, _________ for the accident.
#86200
A
are responsible
B
were responsible
C
be responsible
D
is responsible