It is reported that a lot of adults take lessons online _______ further education.
#47748
A
after
B
to
C
with
D
for
推荐题目
Sally has been swimming ______ four hours.   
#50710
A
for about
B
since
C
about
D
/
Smoking will_______ your health.
#51060
A
be good for
B
good at
C
be bad for
D
bad at