【单选题】
25. In some parks visitors are requested to keep ____ the grass.
①
away
②
off
③
aside
④
out
【单选题】
25. A pilot should be responsible ____ the safety of all the passengers on board.
①
against
②
for
③
at
④
with
【单选题】
25. She put an extra blanket over the baby for fear that____.
①
he catches cold
②
he should catch cold
③
he caught cold
④
. he be catching cold