We can never expect________bluer sky unless we create___________less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
_____ for his action on the playing field ,but he is also famous for the things that he does off the playing field.
| A．Not he is only known | B．Not only is he known |
| C．Only is he known not | D．He is only not known |
Nowadays, cellphones have features such as games ,music and calendars and more new functions___.
| A．are added | B．have added | C．are being added | D．have been added |
It is the interaction between people, rather than the events ___ occur in their lives, ____ is the main focus of social psychology.
| A．that; that | B．that; which | C．which; which | D．that; what |
—Will you join us in the party this Saturday evening?
—If I ____ ,I would ;but I will have left for Japan on business by then.
| A．am free | B．were to be free | C．will be free | D．would be free |
He didn’t put the things ______ they belonged, for ______ reason he got his punishment．
| A．which; that | B．what; this | C．that; whose | D．where; which |