PSAs are often run _____ free, and are ______ to educate people about health, safety, or any other problem that affects public welfare.
#26545
A
for, mean
B
for, meant
C
of, to mean
D
in, meaning
推荐题目
Taking regular exercise and eating a balanced diet are two important keys ________ good health.
#25278
A
in
B
from
C
of
D
to
______ the assignment said above, you have to write a 200-word composition on environment pollution.
#25398
A
In addition
B
Apart from
C
Except
D
Other than