.I wonder how he could __________ not handing in his maths exercises yesterday, for his maths teacher is always strict with his students.
There was a fire accident in the hotel last night. Fortunately everyone had a(n) _____ escape from the fire and no one was hurt.
With his attention _____ on his book, he didn’t notice me enter his study.
Unfortunately, it rained for two weeks, which completely _______ our plan.
It is really _____ useful dictionary, ______ dictionary every one of us needs.
– My friend Jack said something bad behind my back, and I feel a bit sad. -- Well, don’t take it seriously; you know, there is a saying that goes “__________”.