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
E-mail, as well as telephone,______ an important part in daily communication.
#86303
A
is playing
B
have played
C
are playing
D
hoped
Britain ____ many other industrialized countries, ____ major changes over the last 100 years.
#85781
A
together with; have experienced
B
as well as; have experienced
C
in common with; has experienced
D
instead of; has experienced
Large quantities of time ______ for practising guided writings.
#85977
A
was needed
B
are needed
C
needs
D
is needed