We should adopt ________ methods to deal with some incidents.You know, anything could occur in that situation.— I got it.Thank you for reminding me. [ ]

John was so sleepy that he could hardly keep his eyes ______.

known about this computer program, a huge amountof time and energy

mer camp isn’t ________ good fun, but it is ________ real learning experience for me.

The thief was caught by the police in therailway station before he was able to _____.