Computers are used        workers        helping make many dinfferent things now.
#48487
A
to, for
B
by, for
C
by, to
D
for, to
推荐题目
—How  do you get to school?—I       .
#50371
A
by subway
B
on foot
C
ride my bike
D
by bus
1 think drinking milk is good _ our health.
#50646
A
for
B
to
C
with
D
at
There are many trees ____ our house.
#49785
A
in front of
B
in the front of
C
behind of
D
at the back