The room ___________ window is open is mine.
| A．which | B．its | C．that | D．whose |
I find that looking after children is a fun and challenging job ___________ you need to be patient and careful．
| A．That | B．which | C．where | D．when |
___________ we can have clean drinking water lies in ___________ effective measures will be taken by the government about water pollution.
| A．Whether；that | B．If；that |
| C．Whether；what | D．If；what |
There are many new central leaders in China now, ________ many once worked in the western provinces.
| A．in which | B．of whom | C．in whom | D．for whom |
Both students and parents appreciate the great importance schools have ______to eyesight protection.
| A．reacted | B．attended | C．attached | D．adapted |
--- Cathy, why does your roommate look angry?
--- I’m also feeling puzzled. Maybe I ______ a nerve while asking about her former boyfriend.
| A．have touched | B．was touching | C．had touched | D．touched |