A forest is usually found _______ heavy rainfall is frequent.
| A．there | B．which | C．where | D．because |
. There are dirty marks/spots on her trousers ________ she had wiped her hands.
| A．where | B．in which | C．when | D．that |
. You should make it a rule to leave things ________ you can find them again.
| A．so that | B．when | C．where | D．and then E) there |
. He told me to leave out the articles in this sentence ________ it is possible.
| A．where | B．in which | C．that | D．what |
. They were surprised that a child should work out the problem _____ they themselves couldn't.
| A．once | B．then | C．while | D．if |
. The film brought the hours to me ________ I was taken good care of in that far-away village.
| A．until | B．that | C．when | D．where |