---Did you remember to take the key to Tom?
---Yes, I gave it to him ________ I saw him.
A. while B. once C. suddenly D. the first time
It is ________ world of wonders, ________ world where anything can happen.
A. a; a B. a; the C. the; the D. the; a
Father ________ for London on business upon my arrival, so I didn’t see him.
A. has left B. left C. had left D. was leaving
The boy’s dream was to have his own laboratory ________ to try out some of his own ideas.
A. from which B. in which
C. by which D. at which
There is a common belief among them ________ rubbish can should be put to good use.
A. which B. what C. whether D. that
The happy ________ of children playing in the garden disappears, and it is quiet again.
A. spot B. view C. scenery D. scene
