—Sorry,Mum, I lost my key to the bicycle again.—Oh! How you be so careless! You have to learn to look after your belongings.
John was so________that he could hardly keep his eyes________.
He kept the light in his room________the whole night.
________you put your heart into your study, you'll feel________in it.
That is the place where I________when I was a child.
The classroom is big enough________, but we'll have to move if we have more students.