—Did you attend David’s wedding last night?
—No. I ________ before that.
| A．wouldn’t have been invited | B．didn’t invite |
| C．wouldn’t invite | D．hadn’t been invited |
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 |
It is obvious ______ the local government can do to protect the environment for the next generations.
| A．how | B．what | C．that | D．which |
— Why do you think he is feeling spiritless?
— Because staying up late makes him at his worst ___________ physical situation．
| A．in terms of | B．in addition to |
| C．on account of | D．regardless of |