Chemical processes _______in the treatment of materials for clothes _______the environment badly in some countries nowadays．
| A．involve；damaging | B．involved；damaged |
| C．involving；damage | D．involved；damage |
I'll never forget the day _______ I bought my own guitar with my own money.
| A．where | B．on which | C．on when | D．that |
She is just the girl, with _______ my brother came to visit me last month.
| A．whom | B．her | C．that | D．who |
Last night we saw two movies, _______ was interesting.
| A．both of which | B．neither of which |
| C．both of them | D．neither of them |
This is the house in _______ I was born thirty years ago.
| A．it | B．there | C．which | D．that |
The reason for _______ he failed in the exam was that he was too careless.
| A．which | B．why | C．that | D．it |