By the time he realizes he ______ into a trap, it’ll be too late for him to do anything about it. [ ]

many extra planes and trains are usedto carry passengers, traffic tools are still ______needed during “May Day”holidays

Just a minute, Tom. Is this the report you need to hand in today—-Oh, yes, Mum. I thought I had put ________in my schoolbag. Thank you.

Your advice is ______great value to our work

The Olympics are like a huge stage ________ everyone makes every effort to achieve their dreams.