“Perhaps we need to send for Dr.Smith to see what we can do about it,”Father suggested___to his neighbor who had come to discuss the problem
It is ________ world of wonders, ________ world where anything can happen.
Father ________ for London on business upon my arrival, so I didn’t see him.
The boy’s dream was to have his own laboratory ________ to try out some of his own ideas.
There is a common belief among them ________ rubbish can should be put to good use.
The happy ________ of children playing in the garden disappears, and it is quiet again.